Detective Jason Flynn of the L.A.P.D. is still reeling from the world-changing events he endured at the hands of the serial killer called Abel. He is scarred by run-ins with horrific killers, and his psyche can't take much more. However, a monotonous morning in the L.A. heat will quickly devolve into the worst day of his life. Tobin, a 13-year-old boy, unwittingly frees a hostage who was about to be executed by a brutal cartel. Jason is in the wrong place at the very wrong time, and he finds himself filling the role of protector as he evades cartel gunmen and ensures Tobin and the hostage get to safety. And on top of all that... the "Big One" hits. The worst earthquake in L.A. history ravages the city. Amid the chaos and ruin, Jason and his reluctant allies need to find a way to survive.