Ladykiller is an absorbing whodunit about a police detective who becomes romantically involved with a prime suspect in a murder.

Detective Michael Madison is a crime photographer who works with evidence. She likes to get the full story, so when she is called in to photograph a woman who has committed suicide and the evidence doesn't add up to suicide, she becomes very interested in the case. The woman may be another victim of a murderer somehow connected to a dating service. Michael also is dealing with the emotional trauma of facing an approaching birthday without a mate. Out of frustration, she resorts to a video dating service. Shortly afterwards, a man appears unannounced on her doorstep claiming to be from the dating service and introduces himself as Tim Smith. They go out and end the evening in a hotel where they make love. While he is asleep, Michael checks his wallet for ID, but there is none. Tim says he will call her, but when he doesn't Michael tries to trace him through the dating service which has no record of him. She does research on what little evidence she recalls and locates him through a clothing label from an exclusive haberdasher. He is really Jack Packard, very wealthy and very married. A Tim Smith was the prime suspect in the disappearance of a woman a year ago and since that time several other women, somehow connected with the dating service, have been murdered. Jack, alias Tim, is Michael's prime suspect.