Stranded in an abandoned Italian seaside town, a man is desperately searching for inspiration. When he finds his first muse, he will use any means necessary to make her immortal.

Mia, 12, is spending her vacation at a lake in the Black Forest with her parents, who have been separated for years, and their new partners. While the adults try to keep things light, Mia escapes more and more often into the forest, where she meets a mysterious boy. On the morning of her birthday, Mia disappears. The fragile family structure is turned upside down and Mia's new freedom becomes increasingly dangerous.