For three years Troll Mill has stood empty, and Peer Ulfsson has found a home with his friend Hilde. One day, returning from a hard day's fishing, Peer watches horror-struck as his friend Kersten rushes to the shore, thrusting her baby into his arms, and throws herself into the sea. Struggling home with the baby, Peer passes the old mill, once owned by his wicked uncles, and sees the millwheel turning! But it has been derelict for years... Who or what could be lurking in the shadows?