A dad moves into a new house with his son and girlfriend. When he's out of town working, the son makes a new "friend" next doors.
A man is found dead, stabbed to death with a knife. The chocking thing is that his face has been removed. After questioning his wife who described the marriage as happy also told that a mysterious foreign man knocked on their door the day before the murder. Beck and his men are given the case.
The story of a lone father's relationship with his daughter, of the destructive power of alcohol, of a child's vulnerability, but also of love, betrayal and socialist politics in 1970s Sweden.