Action thriller directed by Val Guest and starring Telly Savalas, Peter Fonda and Hugh O'Brian. The Syndicate Diamond Corporation facility in South Africa has been infiltrated by a thief. Unable to resolve the situation themselves, those in charge enlist the services of security expert Webb (Savalas). The situation is complicated by the presence of a band of mercenaries outside the facility looking to cause further trouble. Employee Bradley (Fonda) becomes involved in a risky attempt to dispose of the rogue mercenaries by himself posing as a diamond thief.