The collapse of society forces the Colter family to kill or be killed. To escape, they decide to return to Jesse's childhood home of Haven. On the perilous journey they encounter a deserted genetics lab. That evening the results of a genetic experiment, five massive dogs working as a team, walk into their camp. The dogs finally disappear back into the dark. On a second visit, the dogs become friends of the family.As they near Haven, a sheriffs warning about a brutal gang, triggers a buried childhood memory for Jesse and the gangs involvement in the death of his parents. The gang decides to visit Haven. The Colters set a brutally effective trap. Jesse is severely injured, but survives.Sarah and Jesse, with the help of their friends, build a future and slowly things get better. At the end Jessie is alone and dying. It's his time, and he feels complacent. He's an old man with a bent back and a deep love for Sarah, sitting in a small clearing on the side of a mountain overlooking Haven.