A tough police detective is assigned to protect a Mob witness for 48 hours, only for hitmen to find their hiding place and try to silence the informant. The rebellious cop realises something does not add up and goes in search of both the killers and whoever told them where to locate their target - but an ambitious politician wants him off the case. Thriller, starring Steve McQueen, Jacqueline Bisset, Robert Vaughn and Robert Duvall