The Olsen Gang becomes millionaires. Unfortunately for the gang, their arch-enemies, the King and the Jack, are planning to steal the money for themselves.
Knut Storlien walks over the mountain on his way home to his parents' farm after several years in South America. He does not quite remember the road and gets help from Inga, who lives on a farm nearby. They witness how Inga's brother kills a man who owes money.
A reindeer company is being robbed for reindeer. The police hasn't got a clue, and a new investigator is sent. The thieves want to get rid of him, but things don't go as planned.
