Detective Nick Cantello has just lost his partner to a bullet–one that was meant for him. All he wants is to find the people responsible. What he gets is a "babysitter"–one who comes with a dog. As part of the canine unit, Lara Nelson is used to having a four-footed partner. So she's unprepared for her latest assignment–guarding another cop. Together, Nick and Lara must find the killer. Only when the case is over can they figure out how to deal with the consequences of the night their attraction for each other reached the point it could not be denied.