For the first time ever, Rico has a friend coming over for a sleepover! After weeks of not seeing each other, Rico and Oskar meet again and their adventure begins with the weekly bingo at the retirement home. But even though Tanja even wins two purses, Oskar seems suspiciously grumpy and Tanja strangely sad. Also, Oskars' dad leaves a bag in front of the door because he needs some distance from his son. Such heartache is too much for Rico! When Oskar finally tells Rico that Tanja was cheating at bingo the other night and that those ugly bags he wins all the time are really expensive leather bags, Rico refuses to accept that his mom should be a con artist. . Ellie Wandback, the bingo hostess, must be singing it. Since the Bühl is too busy with a redhead drinking champagne, Rico and Oskar seek the help of the cheerful pensioner, Mr. van Scherten, and together they try to find out what is going on. Not everything goes as planned but in the end the two young...