After a series of targeted bombings in Queens, the team fears a citywide gang war is imminent – until a tip from OA's old Army buddy, Clay, directs their attention to an unexpected and powerful foe. Meanwhile, Scola continues to struggle to find a new partner.

When a gunman opens fire at a homeless shelter in Astoria, the team is led toward a killer with connections to a Mexican cartel.

After two women are brutally murdered via napalm, Maggie and OA are led to a dating site where they discover a group of scorned users who are targeting women who reject them.