On Tokyo Jupiter, a 17yr old boy, name Ayato, is living a normal life until, Tokyo Jupiter is attacked. When Ayato is saved by Haruka, Ayato cracks an egg which released a structure, known as RahXephon, to fight against Mu.

Itsuki finds a stone, while examining the Dolem that was defeated in the prior episode. Itsuki takes that stone and gives it as a gift to Sayoko, for Christmas. After, he goes to the beach and invites Ayato, Megu, and Haruka and the others to a Christmas Eve Party. And it begins to snow. While Megu and Kim are shopping Megu talks about Haruka, while Haruka gives Ayato gloves. And a Dolem appears to freeze everything. And RahXephon and Ayato must defeat it, but there's a problem, Sayoko is a part of it. And it's up to Ayato to save christmas for Nirai Kanai. When it looks in doubt, Ayato thinks of Haruka and the gloves he gave her, and saves the day.

B-Storyline: Quon stays in bed under her blanket, because she hates the snow.

Tensions mount as the survivors struggle to rebuild their lives among the ruins of Japan. As arguments become heated, Haruka questions her sanity as she begins to see Ayato in various places. Meanwhile, Quon prepares to make her final move.