A young wife and her older, unfaithful husband; a sex-starved actress and her handsome young secretary; a Wall Street millionaire and his teenage son. Six guests. Six victims. A devastating journey into darkness. At his famous, elegant Swiss chateau-clinic, Dr. Herbert Mentius discovers an incredible enzyme that reverses the process of aging. But on the shores of Lake Lucerne, a secret plot is underway. Six guests are caught in a spiraling vortex of evil, lust and terror - as the promise of immortality becomes a frightening conspiracy of death!