Rick makes a decision to go back to Atlanta to retrieve the bag of guns and save a man's life. Lori and Shane must deal with the surprising return of someone they thought was dead.
Rick unknowingly causes a group of survivors to be trapped by walkers. The group dynamic devolves from accusations to violence, as Rick must confront an enemy far more dangerous than the undead.
Rick searches for his family after emerging from a coma into a world terrorized by the walking dead. Morgan and Duane, whom he meets along the way, help teach Rick the new rules for survival.