Henkka Virtanen finds evidence of a possible crime on his way to school. With his friend J.K. Kivimutka, the boys decide to investigate what has happened, because these criminal cases are the responsibility of the detective agency they have set up. When it turns out that mailboxes in the area have disappeared during the night, the detective bureau has already two crimes to solve. A fun and exciting adventure begins, in which the boys also have to face their own fears.

Kummelin Jackpot, was released in February 2006. It was about a divorced man portrayed by Silvennoinen, who realises a way to trick himself a jackpot in football betting.

During the Finnish war, highway robber Jeppe Antinpoika robs the Swedish king's treasure and the bag of precious stones remains hidden for 200 years. City girl Arska arrives on vacation at Herra Heinämäki's farm. Heinämäki's neighbor, the baker Kakelberg, has a haunted house and one evening Arska runs into a mysterious creep. Arska starts solving the riddle of the baker's house with Heinämäki.