As humans sit at the top of the food chain, will a world ravaged by a deadly virus leave you trembling with fear? How can humanity survive? Can people still trust one another? Chu Feng, an ordinary man living in the city, is lucky enough to avoid infection. To survive, he has no choice but to force himself to grow stronger. More importantly, he has lost contact with his parents, who are far away in another land. They are the ones he cannot let go of. And so he resolutely sets out on a perilous journey…