
Tom Selleck stars as Frank Reagan, the New York Police Commissioner, and patriarch of the Reagan clan, a multigenerational family of cops. Frank's oldest son is Danny, a seasoned detective and Iraqi War veteran who occasionally uses dubious tactics to solve cases. Daughter Erin, the lone female, is an assistant district attorney. Fresh out of Harvard Law, Jamie is the youngest member and "golden boy" of the family. Jamie gave up a lucrative future in law to continue the family's tradition in police work, and is asked to participate in a secretive investigation that even his father does not know about.

Frank orders everyone to help investigate when NYPD Deputy Chief Donald Kent and his wife are gunned down in what appears to be a gang hit.

Danny fights to control his emotions as he tries to track down the gang member responsible for shooting a member of the Reagan clan.

After a terrorist attack takes place in the Middle East, a threat to New York may be next, putting Frank on high alert.

Danny receives a chilling message from a possible serial killer; Erin considers applying for a judgeship; mayoral candidate Katherine Tucker (Mary Stuart Masterson) thinks Frank is secretly investigating her husband.