Sally senses someone following her just before she is knocked down and her purse is snatched by a thief. Later, the purse is returned with all the contents intact along with a candy heart that says "I Love You", and the thief winds up in the morgue as a murder victim. Mac consults his colleague Dr. Marion Voight who tells him that Sally's admirer is most likely someone already in her life. The clues point to various suspects, and Sally and Mac are both threatened separately. Mac struggles to make sense out of the bizarre events before someone else ends up dead.
—Anonymous