A cop convinces a friend on the wrong side of the law to trust him, only to see their lives endangered when someone else betrays that trust in this Dutch crime thriller. Eddy (Cas Jansen) is a police detective whose career seems stuck in neutral. Hoping for a promotion, he warily agrees to approach his old friend Jackie (Victor Low), a small-time hash dealer, and persuade him to act as an informant as the police try to put Haveman (Ton Kas), one of the nation's biggest dope wholesalers, behind bars. Jackie and his wife have just become parents, and Jackie thinks becoming a police informant might prevent him from doing serious time if he's ever busted, so he agrees to cooperate with Eddy under the condition that his status as an informer be kept a strict secret. But Eddy soon discovers that someone in the department has been leaking information about Jackie's secret testimony, which puts both Jackie and Eddy's lives in great danger. Lek was directed by Jean van de Velde, who enjoyed a pair of major box-office successes in the Netherlands with All Stars and De Kleine Blonde Dood.