In 1958, a young Egon Olsen tries to escape from the orphanage by being adopted by a rich couple - but his new "parents" are rocket scientists who want to shoot him into space.
Egon escapes from the psychiatric ward, where he has been incarcerated since the gang's last coup. Keld and Benny pick him up, and when Egon, as always, is planning the big heist, the Olsen Gang is once again on the move.