Malcolm takes a detour from his mandated vacation time when he finds out a killer on the loose is mimicking homicides from one his favorite children's books, "The Count of Monte Cristo." With added help from a very excited Martin Whitly, the NYPD trace the case back to a high society family planning one of the biggest weddings of the season, so Malcolm and Dani get dressed up to attend the event and track down their culprit.

When a priest is found murdered in his place of worship, Bright grapples with its effect on his own trauma.

Martin is delighted when a murder at Claremont Psychiatric brings the NYPD into his territory, allowing him direct involvement with one of Malcolm's cases. While working the same job, Ainsley's suspicion grows when she feels Malcolm may be hiding something from her. All the while, Malcolm and Ainsley must dodge their mother, who's wondering why they got rid of her favorite rug.

As Malcolm distances himself from Martin, Jessica does the opposite, diving head-first into the past for the sake of her tell-all book. Meanwhile, Martin is desperate to get in touch with his son ahead of his imminent plans, as Dr. Vivian Capshaw grows increasingly suspicious. Meanwhile, the NYPD investigates a crime of passion.

After a terrifying incident at Claremont, Malcolm is in a race against time to track down multiple killers. The NYPD realizes someone close to home might be the key to finding them.