I watched a German-language version of this co-production, which is probably on a par with the Italian one, since it was scripted by a top German writer-producer Franz Seitz, who contributed to many classic films including Volker Schlondorff's THE TIN DRUM and Max Schell's THE PEDESTRIAN. Unfortunately the action here is strictly pedestrian. Three beautiful young girls are vacationing on a magnificent yacht (belonging to the daddy of one of them), along with a stud acquaintance they bring along for obvious reasons. Centerpiece of the film is their experimenting rather disastrously with LSD, as the stud, listlessly played by Bernard De Vries, wakes up from a bad trip with a bullet hole mysteriously in his side.