From The CriticsHighly recommended
Ben Callahan readily accepted the offer from Emma Montgomery. As a private investigator, he is more accustomed to clients who tried to weasel their way around expenses and final pay, rather than Emma's generous offer. He not only needs to cover his own bills, but also the cost of the independent living community where he has placed his mother. Emma's job is also intriguing. Emma believes her granddaughter is "in the process of finding herself and she needs a keeper."
The first moment Ben sees the picture of Emma's granddaughter, he's hooked. Just looking at Grace Montgomery's picture is enough to rev up his libido. So Ben travels to New York City, taking the apartment across the hall from Grace.