Li Xuan was an ordinary person at a low point in his life. He was accidentally taken to a black hut by a driverless bus, where he was trapped with a group of cursed people. There is a blood-red door in the hut, and people are regularly pulled into the terrifying world behind the blood door to complete tasks. When she was about to die, Li Xuan activated the system, which became the key to changing her destiny. However, the villain forces covet the power of the system and secretly sabotage her to obtain resources. Li Xuan not only had to deal with the initial difficulty of surviving in a terrifying world because of his insufficient abilities, but he also suffered from the hostility of other cursed people because he was misunderstood. At the same time, the opening time of the blood gate is limited, and she must complete the task within the specified time, otherwise her life will not be saved. As he completed tasks one after another, Li Xuan gradually became stronger, but found that he was hiding key information related to the origin of the system. Once exposed, it would trigger a crazy pursuit by the villain, and even lead to an emotional breakdown with his companions. But with her tenacity, reason and action, she worked hard to counterattack in this desperate situation, explore the truth behind the treacherous house, and save herself and everyone else.