The child-duo Rico and Oskar, one of them is quite more sluggish, but precisely because of fantasy and own world view; the other one is a smart whiz, but scared for life.

The friends and amateur detectives Rico and Oskar experiencing their last adventure together. Here everything is really only one well, because now they live next door to. Ricos mother Tanya and Buhl are together, Oskar is with his father Lars pulled to Rico into the house. But dies as the grumpy Fitzke, the trouble begins. The stone Breeder inherited Rico his beloved stone-collection over which the boy also very pleased - but then he and his buddy note that Rico's favorite stone calf stone was stolen. The task now is to make the thieves apprehended. And because there are on the way to the Baltic Sea, Rico and Oskar must as soon as possible afterwards. Glad Tanja is flown by Buhl in the "snogging holiday" ...

For the first time ever Rico has a friend coming over for a sleepover! After weeks of not seeing each other, Rico and Oskar are reunited again and start their adventure with the weekly bingo at the retirement home. But although Tanja even wins two handbags Oskar seems suspiciously grumpy and Tanja oddly sad. On top of things Oskar's dad leaves a bag in front of the door because he needs some distance from his son. So much heart affliction is too much for Rico!