An intoxicated Professor Joosten is pulled from the water. The man tried to dump the head of a horse into the water, but fell into the water himself. When the horse's remains are discovered in the professor's garage, he finds himself in trouble. He finds himself on thin ice altogether when it turns out that the horse was owned by Alexia Maselis, his ex-girlfriend and daughter of Claude Maselis, a close friend of Schietekatte's.