Handsome, clever final year law student Koen avoids being beaten up by street thugs by claiming he's a maternal cousin of crime baron Henk de Koning. The next day, Henk praises Koen's wit and commandeers 'cousin's' help to retrieve the treasure presumably hidden by disloyal accomplice Sjon de Nooyer, who was released from jail to a retirement home, be volunteering as orderly, posing as his distant relative. Dirty police detective Uitenhaage is after the same fortune, and leans independently on innocent Koen to spy on Sjon.—KGF Vissers

Law student Koen rescues himself from a threatening situation with street scum by claiming that top criminal Hank de Koning is his uncle. He gets deeper into trouble as Uncle Hank 'a few days later rings at his door. Koen may return the favor for him, that for Koen of course is impossible to refuse. No, you don't easily get rid of Uncle Hank...—Stetz Film