A wealthy family reports a burglary, but when Eriksen investigates there seem to be something fishy about it. Meanwhile a guest of the hotel Gripsholm is found shot in his room.
A suitcase is found but the owner, an old man, seems to have disappeared. A crazy Swede enters different stores about the same time as valuable watches or cameras are stolen.
An elderly woman is assaulted and robbed. It is the fourth such attack in a month, and the residents of the area are very dissatisfied with the police's handling of the situation. They set up some private guarding to take matters into their own hands.