When teenagers who were reported missing are suspected of a series of mass murders in Chicago, the BAU investigates their whereabouts to find a motive for the crimes. Also, Morgan has conflicting feelings when his girlfriend takes her job at a hospital as seriously as he takes his.

When the BAU investigates several murders in the Pittsburgh area, the team searches for a pair of UnSubs working as a team. Also, Garcia and Morgan share their Valentine's Day plans for their respective significant others.

When 3 unrelated people, of different ages and gender, are kidnapped the BAU races to find the connection and find them before the Unsub kills them.

People in Maryland with large social media followings are murdered by an unsub who takes on the persona of an Internet urban legend. Meanwhile, Morgan and Savannah struggle to find quality time for each other due to their business careers.

The BAU hunt a serial killer in Wisconsin and try to find a connection between the victims so they can profile and identify the UnSub. Meanwhile, Kate experiences trouble dealing with her niece when she starts acting out.

As Reid narrates to one of the hitmen how they tracked her, the BAU works to get him out of the hitman's gunpoint.

The BAU heads to the Los Angeles, California area, where two women, in separate incidents, were found murdered within a day of each other, each found in their own home with no sign of forced entry, both single, and both having died of asphyxiation from being wrapped pre-mortem by a regular household item like a blanket or rug. By the time the team arrives at the Los Angeles FBI field office where they are basing their investigation, a third dead body with the same victimology is discovered. From surveillance footage at the third victim's apartment complex, the team believes the unsub is either masquerading as an FBI agent or truly is one. When the team determines that he is only masquerading as one, but that he needs to gain the confidence of his victims by real world events, they decide to set a trap for him that is potentially dangerous for the public. But in doing so, they, in the process, learn of an unfortunate real life tie to the agency. Through it all, Morgan can't help but worry about a text he received from Savannah before the team left for Los Angeles in her need for them "to have a talk".

The BAU works against time to find Morgan after he is kidnapped. Danny Glover guest stars.

The team searches for an unknown subject who abducts children after visually impairing their parents while they sleep. Distracted father-to-be Morgan tries to find out who attacked him.

When an unsub targets the BAU, the team pursues the person who is responsible for the actions.