Bertram’s uncle, a petty criminal, hurls him and the whole family into the kidnapping of a rich man’s son to get money for a new flat after they’ve been kicked out by the bailiff. But things don’t go quite as planned. The film is an action-packed gangster comedy for the whole family, a kind of “Ocean’s Eleven” for children and the young at heart.

Mads "Crumb" Krumborg need a new bike so he can take part in an important race against a neighboring school. But it will be difficult to afford to buy a new printer, since the boy's father suddenly decides to terminate his job to invent a machine that according to him will change the world. At the same time a couple of crooks wind of his father's invention, and when the family Krum Borg's future is in problems, Crumb and his siblings to the occasion and save the day.