Peacemaker (John Cena) is approached by Clemson Murn (Chukwudi Iwuji), who asks him to join a team dedicated to keeping the peace by killing evil people. Peacemaker teams up with Harcourt (Jennifer Holland), John Economos (Steve Agee), Vigilante (Freddie Stroma) and Adebayo (Danielle Brooks), their new recruit. The unlikely group of killers do their best to come together as a team.