Photographer Drew Harper's sister is convinced that the resident of 410 South Elm Street is her husband's mistress. But when Drew helps with a little reconnaissance, he meets Mia Stallone -- who doesn't seem the mistress type at all. Plagued by survivor's guilt from a devastating loss, Mia is afraid to let herself be happy. When Drew shows up, she feels a spark she never thought she'd feel again. But is his interest only in gaining information for his sister?