The wife and mistress of the abusive headmaster of a boy's school plot and carry out his murder. They dump his body in the murky swimming pool at the school and await for it to surface. After several days, some unusual circumstances point to clues that he is not dead after all.

Tuesday Weld
as Vicky

Joan Hackett
as Claire Elliott

Sam Waterston
as Michael Elliott

Lucille Benson
as Mrs. Turner

Michael Lerner
as Jerry Steele

R.G. Armstrong
as Mr. Turner

Ed Bernard
as Coroner

William Turner
as Mr. Griffiths

Lance Kerwin
as Chip

Sandra Coburn
as Woman