The Nightwatch(1989)

Dark and brooding thriller. A group of mercenaries are assembled in Amsterdam by a British intelligence officer. Believing they are awaiting the details of a new mission, they decide to spend their free time in the sleazy bars and brothels. Over the course of the weekend it gradually becomes clear that all is not what it seems. Unknown to them their paths have all crossed before, and the deceit and violence of the past is about to become their own downfall.