François Landolt

Hélène Masson visits her friend Gérôme Savignat in the isolated rejuvenation clinic owned by Dr. Devilers and his partner Dr. Berbard. But after a series of tragic events, Hélène goes further in her investigation of the clinic.

"Le Crabe Tambour" ("Drummer Crab") is the nickname for the mysterious central character, Willsdorff (Jacques Perrin), an Alsatian, whose doomed, out-of-date career is recalled through the tales of three naval officers currently serving aboard a French supply ship in the North Atlantic.