Die Engel von St. Pauli (1969)

Jule Nickels, a long-established mobster in St. Pauli, Hamburgs well known demi-monde, has to deal with a new mack in his own territory. Jule tries to get him out of town, but when one of Jule's prostitutes is murdered by a client, both mobsters try to hunt him down to preserve the peace and keep out the cops. But peace doesn't come easy in St. Pauli.