A group of business friends gather together at a seaside house in hopes of laying their hands on the patent of a revolutionary new scientific formula.

Bids, counterbids, lies and deceit are all part of the game; unfortunately so is a killer in the midst, who picks off the group one by one!

Fashionable to the nines, and wonderfully late '60s in atmosphere, this benefits from Master Bava's seemingly relaxed directoral style....a fun one all around.

Only complaint: if only the beautiful Fenech had more screen time. 'Nuff said.

Also known as Island of Terror.