The movie begins with a late-night adultery scene in a condo/mansion in the house of a big gangster (maybe Mafia) between his wife and a roughneck goon, and suddenly the gangster turns up in his car and is suddenly shot dead. Next comes another scene, when a petite cop (not blonde) after finishing her shift, engages into a steamy sex session with her partner, a slightly older man, but then both are radioed by their Chief to investigate the crime.
The female cop engages in rampant sex with every man she comes across, including the goon mentioned before, while prodding them for investigation. Her partner too is happy to shack up if allowed by the broad he has approached. Surprisingly both engage in straight sex, never in a same gender fling. In the end, the lady cop cracks the case while walking into a makeout session between the wife and another woman.