With college entrance exams just 1 week away, Chen Yuan was facing a critical turning point in his life when he was suddenly plagued by an all-too-real “dream.” It was an “Apocalyptic World” teeming with zombies—even if he was attacked by zombies and suffered from starvation in the dream, whenever he fell asleep, he would awaken back in the Real World. Perhaps due to his debilitation in the Apocalyptic World, strange abnormalities began occurring in his physical condition in reality as well. It seemed there was some kind of connection between the Apocalyptic World and the Real World. Realizing that dying in the other world might mean dying in reality, Chen Yuan fought back and defeated a zombie to survive. Upon doing so, a green gem known as a “Crystal Core” dropped from the defeated zombie. When he put it in his mouth, his injuries healed as if by magic, and a mysterious power surged through him… Traveling back and forth between the Real World and the Apocalyptic World through sleep, will Chen Yuan ultimately be able to pass his college entrance exams?