For Murray Kirk, running a private investigation agency is a business; he isn't interested in justice or crusades, just profit and loss. And, because Murray knows something about police corruption, when he's asked to act for a young officer accused of bribery, he isn't keen. He can't see the profit - until he meets the man's fiancée. Then his motives become uncomfortably confused, and he finds himself descending into a murky world of bookmakers, gangsters and crooked politicians, where setting up an honest cop is all in a day's work ...