Lily is undercover as the girlfriend of a young Irish mobster. She ends up agreeing to marry him in order to draw his mob boss father into a position to be arrested. Joe orchestrates the wedding as bait but it turns out Lily has to go through with it and marry the guy in order for them to get their man.

Joe and his agents infiltrate a dating service in order to catch a woman who is suspected of killing several of her past dates. Caroline Glenwood is a lethal temptress, suspected of murdering more than one of the wealthy men she has met through dating services. Joe, posing as a potential suitor, puts his crew in place posing as dating service employees in order to stop Glenwood before she kills again.

Joe must investigate Andy, a fellow FBI handler who's also one of his best friends, after a city councilwoman is murdered and the chief suspect is an informant under Andy's direction.

Joe enlists the help of his former handler when two of his agents disappear during a dangerous mission. Also, Heather looks after a witness who thinks someone is following her.