A spirit girl falls in love with a human boy who dies saving her, then spends the movie trying to undo it by breaking every rule of the spirit world. The animation moves like watercolor, fluid, gorgeous, sometimes frustratingly soft on narrative clarity. What hits is the raw transaction of it: she trades her own world, her future, her safety, all for one person she knew for three days. The film doesn't judge her for it. It just shows you the cost, frame by frame, and lets you decide if love that reckless is beautiful or destructive. By the end, you're not sure which one you believe, and that uncertainty is the whole point.

A spirit realm exists beyond human perception, where supernatural beings orchestrate the natural world: emotions, seasons, storms, the passage of time itself. Chun, a young spirit girl who has just turned sixteen, takes the form of a dolphin to witness the human world as her rite of passage. Her curiosity becomes dangerous when a violent storm traps her in a fishing net. A kind human boy saves her, but drowns in the effort, leaving Chun devastated and guilty. Back in her world, she learns the boy's soul now exists as a little white fish. Determined to bring him back to life, Chun strikes a deal with the Soul Keeper, trading part of her own lifespan, unaware that meddling with the natural order carries severe consequences. The film weighs sacrifice, love, death and her own growing emotions as she chooses between saving the boy and her duty to the world's order.