Late at night extreme climbers risk their lives to climb up the side of a building, the Vienna Town Hall. From the ground they watch as one which is climbing appears to lose his grip and falls to his death. When Marc and Rex investigate though they find that none of the witnesses are willing to talk.

Late at night in a cemetery a woman is wandering looking for her friend Sylvia. The second woman is then attacked and murdered. The next morning Marc and Rex arrive at the scene where it appears the first committed suicide and the second was murdered.