A mirror pulls seven broken kids into a castle and promises them one wish each, but the real story is watching them realize they're not alone in being invisible. Every character carries the weight of feeling fundamentally wrong to the world, and the castle becomes a space where that weight gets named instead of hidden. The fantasy setup matters only because it gives these kids permission to stop pretending they have it together.

Kokoro is a junior high student who no longer fits in at school and has shut herself away in her bedroom. One day her mirror begins to glow and pulls her into a fairy tale castle, where six other students who also avoid school are waiting. A girl in a wolf mask, called the Wolf Queen, tells them that a key hidden somewhere in the castle will grant a single wish, and she gives them clues to find it. The rules are strict: the key must turn up before the school year ends, and anyone still inside after five o'clock each day will die. The castle becomes a refuge for the seven during school hours, but as time passes they learn that only those willing to share their stories will be saved. The film is a drama with fantasy and mystery elements, built around what these seven teenagers have in common and why they were chosen.