Tödliche Wende plot
Four prominent Germans go to the Netherlands every summer to spend a holiday on the IJsselmeer without their wives and to hunt women. This time they set their sights on Christa (Claudine Wilde), a young woman who is unknowingly addicted to heroin and who earns her money in prostitution. During a scuffle, Christa is knocked overboard by one of the men and drowns. Her father Wilfried (Tilo Prückner) investigates, tracks down the four men and puts them to the test. Slowly their friendship crumbles, and it becomes clear who the perpetrator is.