The Jönsson Gang's Greatest Robbery

When Vanheden and Dynamit-Harry set out to spring Doctor Busé from prison, they wind up freeing Herman Melvin instead. Melvin has been working at the Swedish Mint, and the doctor who has begun thinking like Sickan has drafted a burglary scheme drawn across Melvin's back. Yet things go awry. The haul is far from the Deutschmarks they expected; instead they find themselves aboard a ship bound for Poland, surrounded by stacks of Polish zlotys. In Poland, they discover that the money has attracted the interest of the mafia, and Wall-Enberg is secretly aligned with them.