In the middle of an event at the police college, a young student freaks out and stabs her buddy. He still dies at the scene in the arms of the helpless main commissioner.

A killed infant is found in a parking lot near Kiels. Where's the mother? Did she kill her child? A found entrance volume leads Klaus Borowski and Mila Sahin to the sleepy town of Wacken in Schleswig-Holstein, which wakes up once a year when the world's largest heavy metal festival attracts 80,000 fans. The first trace leads the commissioners to Caterer Michi, who apparently took the young mother with him.