Liu Kang is training when he has to get out of the way of a piece of falling debris caused by one of Jax's punches. Liu says that just took 10 years off his life, but Jax wonders what the big deal is -he thought Mortal Kombat winners were ageless. Liu says they don't grow old, but either way, he'd rather not be a shish kabob.

As Liu thinks about never aging, he thinks back to the time he fought Shang Tsung. After landing several hits on his opponent, Liu throws out a fireball which knocks Shang into a pit. Liu says that was a flawless victory. After hitting the ground, Shang melts down to a skeleton.

Back in the present, Nightwolf says there is another dimensional rip, this time in New Guinea rainforest. He can't tell who's there, his spectrometers are going crazy, but something is different about this one. He tells the team they'd better check it out right away, so they head out in their dragon jets.

Kitana asks Liu if there is something on his mind. Liu says he's been thinking a lot lately about never growing older because of the Mortal Kombat tournament. Kitana says the Elder Gods decreed that the victor would not age until the next tournament, so the champion may return to compete generation after generation. Liu says the Outworlders have violated the rules, so there may never be another tournament, which means he may never age. Kitana asks him if he fears what it would be like to outlive all his friends and loved ones. Liu says that's part of it, but the idea of spending eternity in constant battle... he just doesn't know if he can handle it. Kitana says she understands, as she's lived for 10,000 years.

Liu thinks she doesn't look a day over 500. She thanks him, but says he must no confuse agelessness with immortality. They are both vulnerable, like any humans. Liu guesses that makes them the perfect match. The team arrive at the rainforest, as the jets pull out into a river. Stryker says there is no sign of a dimensional tear. Kitana reminds them that Nightwolf says this was no ordinary rip.

Sub-Zero suggests they split up and search the surrounding area, as they can stay in touch via their wrist coms. The group head off in separate directions, but Liu sees a light nearby. He heads towards it and comes across some sort of shrine, which has piles of skulls all around it. Suddenly, a ninja called Rain jumps down from above.

Rain starts to fight with Liu, but Liu manages to kick him down and off the shrine. Before the fight can continue, Kitana appears and tells them to stop. Liu asks if she knows this guy, and she says they are very old friends. Rain says they were more than just friends, once. Kitana says she thought he was dead.

Rain says he was merely in hiding, as Outworld has become a very dangerous place under Shao Kahn. The rest of the group then arrive at the shrine, so Kitana introduces them all to Rain. Rain says he has come with grave news: the emperor Shao Kahn has laid plans to invade the realm of Zaa. This will effect all of them, as in that realm is a sacred scimitar that contains the power to destroy the strongest warriors. If Shao Kahn takes it, he will rule all realms, including Earth.

Liu asks Rain how he knows all this. Rain says he belongs to a small band of rebels, who are still loyal to the memory of the old emperor: Kitana's late father. They live in the shadows of Outworld, striking when they can. They have spies in the black tower. He tells Kitana he must leave for Zaa immediately if disaster is to be averted, but he'll need their help as they're sorely outnumbered.

Stryker contacts Nightwolf and says they may need Rayden to open a portal. Rain says that won't be necessary, as the portal here will take them to Zaa. Liu says to hold on a second, as he's not convinced they should be following Rain anywhere. Rayden then appears, asking if they rang.

Sub-Zero is about to tell Rayden what's up, but Rayden says he already knows: they're thinking of visiting Zaa. He says that the realm is like Outworld, he has no power there. So if they go there, they're on their own. Kitana says she must go with Rain, as she owes it to the memory of her father. She says that Shao Kahn's plan can't succeed. Stryker asks if she's sure she can trust Rain. She says they were once very close. Sonya says they should get to it, so the team head through the portal. Rayden teleports away, saying ain't love grand?

The team arrive in Zaa. Stryker asks Rain if he has any idea of where they should start looking for this scimitar. Rain says he fears this realm is strange to him as well. Sub-Zero suggests they separate into teams and scout the area. Liu is about to suggest he goes with Kitana, but Rain says in times past, he and Kitana were a formidable team. He asks if they could join forces once more. Kitana says yes, but Liu says he doesn't get it.

She tells him that she needs to go with Rain, as they have unresolved business. Liu asks who Rain is, and why she's acting like she owes him something. Kitana says that many years ago, she and Rain were engaged. But she then says there is no time to explain more and asks him to try and understand. As Liu and Sub-Zero head off, Sonya and the others have seen everything. Jax thinks poor Liu is so jealous he's going to bust a gut. Stryker says to give Liu a break, as he's in pain. Just then many beasts burst out of the ground.

The beasts go after all of the group, but despite their size, they get taken down relatively easily. Sub-Zero freezes and then shatters one, whilst the others don't fare much better in battle. Nearby is a portal, which the beasts start to run into. Sonya says they've got them on the run.

They're about to go after them, but Rain suddenly throws a smoke bomb at the portal. He then grabs Kitana and forces her through the portal with him. Once the smoke clears, the rest of the group see that Rain and Kitana are gone. Sub-Zero suspects that Rain was sent by Shao Kahn to capture Kitana, whilst trapping them on this plane.

Jax says they need to find a way back to Earth, so the group splits up. Liu finds one of Kitana's fans. Rayden then teleports in and asks them if they're looking for a portal. Jax wonders how he got here, but Rayden says he's been with them the whole time, keeping an eye on them.

Sonya reckons that a paranoid thunder god is one thing Shao Kahn didn't figure on. Rayden creates a portal and says he's a smart thunder god. He tells them they need to get their butts back to Earth pronto, as Shao Kahn is starting his invasion. However Liu says he's not going, not without Kitana. Rayden says Kitana may have got willingly. Liu says he has to know, so he's staying, Stryker says he'll stay too, since Liu will need help.

Rayden reminds them about the Earth invasion, but Liu says he's got to find out the truth about Kitana -if she cares about Rain, or him, as who else can he grow old with? Rayden decides to let him stay, but reminds him he's still mortal. The rest of the team head through the portal, so Stryker asks Liu where they should start. Liu puts the fan back down and says he found it like this. He thinks it was a clue Kitana left behind.

The fan points to a fortress a short distance away. The two get to it and start to climb up one of the walls. Liu asks Stryker why he decided to stay. Stryker says it was no special reason, but then says something happened to him a long time ago.

Stryker says he once met a girl who looked at him the same way Kitana looks at Liu. But he was a riot cop, so his career always came first. He guesses he was never around when she needed him, which led to her finally walking out on him for another guy. Meanwhile, on Earth, Sonya, Jax and Sub-Zero fight against the Cybers. Rayden then appears and uses his thunder to defeat some of them.

Sonya thinks it's about time Rayden made himself useful. As Rayden defeats some more Cybers, he says that strictly speaking gods aren't supposed to do this. Jax is about to insult him but gets punched in the face by a Cyber. Rayden laughs.

Liu and Stryker climb up the castle wall, but when they reach the top, they find Motaro and some Centaurs waiting. Motaro calls them impudent insects, who have defied the emperor Shao Kahn. He tells them they won't survive against him, as he picks up Liu and throws him at a wall. Liu rebounds off the wall and gets Motaro into a headlock.

Stryker fights another Centaur, but the Centaurs then change tactics and start throwing fireballs out of their tails. Liu and Stryker avoid the fireballs, which blow up part of the castle walls. Two of the Centaurs attempt to charge them, but Liu and Stryker get out of the way and then push the charging Centaurs out.

Stryker tells Liu to go and find Kitana, as now Motaro is out of the way, he can handle the rest. He distracts two of the Centaurs guarding a door, which allows Liu to run inside the castle. He goes down some stairs and arrives in a room with a fountain in it. He finds another of Kitana's fans on the floor, pointing towards the fountain.

Liu throws out a projectile which causes all of the water in the fountain to evaporate, revealing a hidden passage in it. Liu goes through the passage and enters a large room, where he sees that Kitana has been chained up on a shrine. She sees Liu approaching but tells him to wait, as several plumes of smoke burst up from the ground.

The smoke comes together to reveal a five headed beast, which starts attacking Liu. Liu tries kicking it but it isn't effected by his moves, and throws him across the room. It then fires a smoke beam at him which he avoids, but as he tries another kick, the monster still isn't effected by the attack.

Liu gets thrown again, this time hitting the ceiling. As he gets back up, he concentrates all his energy, which covers his entire body. He unleashes a super fireball which hits the monster, causing it to explode.

Liu goes up to Kitana and asks her to tell him one thing. Kitana says she would never leave him. Stryker then runs in and says they need to get moving, so Liu frees Kitana. The three head back and Kitana leads the way.

But Rain then appears, asking if Kitana must leave so soon -they've barely been able to reminiscence about old times. Liu is about to fight, but Kitana says she wishes to deal with her old friend herself. Rain says this is a pity, as she was quite the perfect match once, when she was still an heiress. But he's afraid she's nowhere near as attractive without power. Kitana says it pains her to see what he has become. Rain says it shouldn't, as the new emperor has been most appreciative of his talents.

The two start fighting, but Kitana is able to grab Rain's arm and slam him to the ground. Rain goes up to a row of weapons and grabs a club, which he starts swinging around. He ends up hitting a pillar, as Kitana avoids being struck and lands a couple of hits on him. Rain drops the club, but gets back up.

Rain resumes his attack, but Kitana kicks him into the pillar, causing it to break up and make the entire room shake. Rain tells Kitana that they will meet again, but he then jumps into a pool and gets away. The entire castle starts to crumble, but a ton of debris falls down over the only exit. Stryker says they're trapped.

Rayden then appears and asks if they're looking for the exit sign. Liu tells Kitana they do make a good team, even if he does sometimes let jealously cloud his judgment. Kitana says they're both mere mortals, no matter how long they live. It is their most precious gift, something they are fortunate enough to share. Rayden creates a portal and then reminds them that the sky is falling, so they all head through the portal as the castle collapses.