A story about the end of the world that begins with a seemingly fateful encounter. On the last day of 2012, Lu Xiao and his live-in lover Ling Feiyu rescued a young man who was in a daze at home. He was the beginning of everything. The mysterious man seemed to be touched by the love between Lu Xiao and Ling Feiyu, and left a flying eagle necklace before leaving in 2013. Just three days after he left, the apocalypse broke out! A terrorist incident like a biohazard swept the world, turning countless people into irrational zombies overnight! The bloody journey begins.