Qin Zheng wakes up from a nap on New Year's Eve to find the surrounding city completely deserted, as if all fourteen hundred million people have vanished. Checking the home security footage, he sees his family quietly leaving in the early hours without waking him up. He visits the residences of his girlfriend and childhood friend, reading scraps of notes from diary documents, and concludes that he has been collectively abandoned by his closest family and friends. Pained inside, he searches everywhere for the truth, gradually noticing numerous abnormal phenomena appearing in his own body. As clues continue to be pieced together, fragments of past memories slowly revive, and the cruel, hidden truth is gradually surfacing.