A woman vanishes, and her husband calls 911. Months later, police find her badly beaten body and make him suspect No. 1. A strange noise in the background of a 911 call leads police to the true killer.

A woman calls 911 after she finds her mother dead with a knife in her chest; is she a grieving daughter? Then, someone murders a husband in a remote park on Valentine's Day; is it a tragic accident or a lover's tryst gone wrong?