With lethal heat about to consume civilization, mechanic Tommy wakes in the days before everything falls apart. In his first life, he hunted desperately for resources, then his lover and cousin turned on him and left him dying. Given another chance, he channels his rage into constructing a fortress beneath the ground. When the blazing catastrophe exposes the cruelty of desperate people, Tommy refuses to be helpless again. Ella, the nurse who once saved him, is kidnapped and sold through a criminal network, forcing him into enemy territory. Meanwhile, Kenny, a smiling tyrant posing as a protector, strips survivors of everything they own. Surrounded by escalating threats, Tommy must use every skill he has to survive and strike back.