June 30, 2013, in an apartment in Trollhättan, called police find blood with footprints in the hall, a pool of blood in the kitchen, and a child in a crib in the bedroom. The child's mother - Ida Fässberg, 23 - has disappeared.

In 2006, Barbro Karlsson's and Bertil Sandin's house in northern Öland burns to the ground. The couple's remains are found in the remains of the fire. The fear of the murderous pyromaniac on the loose spreads terror on Öland.