Worried about her mother's latest health problem, the pancreas, Jeanne asks Billy to explain medically. Jef and the students help Odilon rehearse the part of Dingemans the Strangler for the annual play in jail, a hopeless task for them and painful for him as the result of various misunderstandings and Sam's self-defense lessons to Betty. Billy is furious that his latest conquest Agnes learned what a party animal and lady killer he is from from fellow economics student Charles-Victor, so he seeks a sneaky revenge using Joop, a Dutch friend, to lure him to Amsterdam.
—KGF Vissers