A woman has been watching humanity for a thousand years, waiting for the moment she has to choose which side she's actually on. When that moment arrives in 1999, it's not a dramatic confrontation, it's a teacher realizing that a thousand years of distance means nothing against a single attachment to the students she loves. The film moves at the speed of someone finally deciding to stop observing and start fighting, and that decision costs everything she's built to protect.
A mysterious teacher named Yukino Yayoi works quietly at Tokyo Observatory, her true identity hidden from the world. When a rogue planet called Lar Metal hurtles toward Earth in 1999, catastrophe looms. Meteors rain down on cities as humanity faces annihilation, and panic spreads faster than anyone can contain it. One of Yayoi's students, Hajime, seeks her out during the chaos. What he doesn't know is that his teacher isn't human. Yayoi is Queen Millennia, an alien who arrived on Earth a thousand years ago and has watched human civilization rise and fall across the centuries. Now, with the planet's survival hanging by a thread, she must finally reveal her purpose for being here. As Hajime follows Yayoi into vast caverns hidden beneath the city, he discovers that her presence on Earth was no accident. The approaching cataclysm has forced her hand, pulling back the veil on secrets that connect humanity's past to its fragile future. Together, they face a choice that will determine whether civilization survives what's coming.