Secrets of Three Hungry Wives

A man, Mark Powers is killed, clearly a woman was with him. the police investigate and they talk to his secretary who tells them that Powers has been spending time with three women whom he refers to as the Hungry Wives and a couple of envelopes which had the names of two of them on them are missing. When word of his death reaches the women, they all recall how Powers came into their lives. And how they discover how Machiavellian he is, and he threatens them, which gives any of them motive to kill him.