Kalle Blomkvist and his friends intervene when a professor and his little son Rasmus are kidnapped.

A member of "Sjöbjörnarna" (a group of executives), asks the newspaper editor Dick Mattson to find Brita Ljungdahl, the former wife of another of the members. The first clue he tries is to ask a certain Maria Vaern, who knows Brita.

Karl Oskar Bohm looks back at his life, his estranged daughter Augusta and his wife Sofia.

Young Greasers, known as Raggare in Sweden, gather at a café outside Stockholm. Roffe is the toughest greaser and kidnaps his girlfriend Bibban, when he discovers that she is out riding with other guys. Bibban falls in love with the sensitive Lasse.