Plot
The movie opens with a scene that fans know all too well: Ryoko and Ayeka begin to fight over chores, and Tenchi runs into the forest after they demand he makes a choice between the two of them. He stumbles upon a huge tree covered in strange flowers, and suddenly vanishes without a trace.
Tenchi has a strange dream of floating through nothingness while surrounded by the flowers he saw before, and wakes up to find himself a completely different person. He's several years older, has long hair, and lives with a beautiful young woman named Haruna. Tenchi shrugs off his old life as a dream and enters a new one with Haruna.
The film jumps ahead six months. Tenchi's family and friends have been searching in vain for him, and the stress is building. His father Nobuyuki has filed a missing-person report, Mihoshi and Kiyone have infiltrated the Science Academy to look for clues, Sasami has returned to Jurai, and Ryoko and Ayeka have moved to Tokyo to continue the search.
Ayeka and Ryoko have become shadows of their former selves: depressed, brooding, and sometimes angry. To pay for their food and lodgings, they've become waitresses at a small diner during the day, and every spare moment is spent showing Tenchi's picture to passersby, looking for some glimmer of hope.
After a chance encounter with Tenchi and Haruna, the girls report back to Washu, who realizes that Tenchi has been drawn into a parallel world very close to ours. A plan to find and bring him back is set into motion.
Meanwhile, Tenchi is beginning to get severe headaches, which for some reason coincide with his fleeting memories of his real life. Haruna becomes very upset when he starts to subconsciously draw crude pictures of Ryoko. To comfort her, Tenchi takes her out to buy engagement rings for one another, and stops for dinner at Ryoko and Ayeka's restaurant. When Ryoko tries to address them, there is no response, and her attempts to touch Tenchi pass right through him, making his headache worse. Tenchi and Haruna fade away to nothingness, leaving Ayeka and Ryoko confused and upset.
Washu and Katsuhito have an encounter in the wilderness, and the old shrine master admits he knows what's happening. Haruna was the name of the woman he left Jurai with, but she died on the way to Earth. The huge tree that Tenchi encountered before he vanished grew from the spot that Haruna's body was buried. Katsuhito explains that her soul must have been very lonely, and drew Tenchi into another world to recapture the love she had lost (due to Tenchi's resemblance to Katsuhito/Yosho at that age). With this new information, Washu finalizes her plan.
With the power of the trees Katsuhito planted over the years, Washu creates a doorway into Haruna's world, and Ryoko and Ayeka enter. Confronting Haruna and Tenchi, they try to bring him back, but his altered memories confuse him, and Tenchi sternly rebukes the two. With her power over the parallel world, Haruna banishes them back to our Earth. Devastated by Tenchi's rejection, Ryoko begins to cry.
Haruna has been draining Tenchi's Jurai Power to keep her world stable, and he begins to feel the effects. The world begins to fade away when Tenchi remembers more about his past, and Haruna cannot hide discrepancies of the "perfect world" from him (such as a maxed-out bank account despite her meager earnings and his lack of a job). Her method of restarting the day (and Tenchi's memories) after something goes wrong stops working just as Katsuhito confronts his past and slashes into Haruna's tree with his lightsword, channeling his essence into her soul.
Haruna recognizes her true love Yosho, and remembers why she took Tenchi away in the first place: as a substitute for Yosho. Yosho and Haruna leave together, Katsuhito reappearing in front of the ruined tree, and Tenchi finally remembers who he is. Without Haruna's presence, her world begins to vanish, and Tenchi has no way of escaping.
Washu can only send one person to rescue Tenchi, and Ayeka tells Ryoko to go. After a bit of relieved banter, Ryoko lifts Tenchi into the sky to teleport them back to the real world, and he looks back down on his false life, "ready to leave it behind". A shot of Haruna's table shows the rings they purchased together, left behind by both individuals as they leave the charade she kept up for so long.
The movie closes as we examine the Masaki household returning to normal life. Tenchi has become young again, his hair short and spiky as it was. Though he does not remember his experiences in the parallel world, he has taken up drawing like his older alter ego, because he likes the way it makes him feel. Just before the credits roll, Tenchi and Ryoko enjoy a quiet moment together as the wind shakes the trees, mirroring a scene involving Tenchi's parents in Tenchi Muyo in Love.
