As the POI team seeks justice for Carter's murder, Finch realizes one of his team members may go one step too far in order to end the war with HR. Also, The Machine gives out the number for NYPD Officer Patrick Simmons, one of the crime organization's key players.

Multiple enemies converge on the POI team as they protect a dying man with a connection to Finch's past whose number has come up. They struggle to keep their enemies at bay without Reese, who has left the team and their mission behind following the tragic war with HR. However, being down one man could have catastrophic repercussions for the team.