In the year 317 of the Abolition Calendar, the giant city "Yuanjing" sank to the bottom of the sea. The survivors built a nine-story tower on the wreckage, dividing mankind into nine levels. Chen Yuan is a scavenger on the ninth floor, making a living by rummaging through scraps. He has a secret: every night when he dreams, he can see what will happen the next day. With the help of his dreams, he escaped countless deaths and glimpsed the darkness at the top - the sixth-level consul will sacrifice a girl from the bottom to the "deep sea" tomorrow in exchange for divine favor. That girl was the only one who ever gave him a mouthful of hot soup. Chen Yuan must save her. But the system told him: People on the ninth floor are not qualified to step into the sixth floor. To make matters worse, more and more monsters appear in his dreams. It seems that every time he uses precognition, he is exposing his coordinates to the deep sea. In his dream tonight, he saw himself standing on the altar, holding a sharp knife, while everyone around him was screaming...
