Kendo instructor Kang Baekho was taken from Jeju-do for a trial in the Supreme Court after being accused of a  murder. While on his way to Seoul, the police car, which he was in, hit a little 'bump' on the road. Now in survival mode, Baekho will do everything he can to lead his new-found group to safety. He must take it upon himself to choose: who is the real enemy? Is it the Biters? Or humans itself...

Young paleontologist Ren is leading an excavation on Hallasan Mountain, provided by renowned archeologist and rival Aron Kwak. There, Ren accidentally makes a remarkable discovery. Deep in the icy crevice lay a caveman literally frozen in time. As they fight for "Baekho", the Neanderthal is just there— waiting to wake up. That's right. He's alive.