The group have been on the road for months and Lori is far into her pregnancy. Rick finds a prison which was seen in the final scene in season 2. They decide to go to the prison and stay there. They kill the walkers outside and then go inside to kill some more. Hershel gets bitten in the leg and Rick has to cut it off. The group meet prisoners who had been in the prison's cafeteria for months. The prisoners had no idea what had been going on in the world since the outbreak started and Rick tells them about it. Some of the prisoners try to kill members of the group and so Rick kills Tomas and leaves Andrew to die while Oscar and Axel are put in another block away from the group. Andrew is still alive and rings an alarm which brings walkers to the prison. A huge battle happens. T-Dog is killed by walkers trying to protect Carol. Lori is about to give birth to her baby as this is happening. Maggie cuts her open to take the baby out but Lori dies. Carl is then forced to shoot his mother in the head. Rick finds Andrew and is nearly killed when Oscar shoots Andrew, killing him and saving Rick. After the attack, Maggie and Carl bring the baby to Rick. Rick finds out Lori died and starts crying.