If one person is destined to be left behind and become a sacrifice to open the door to time and space - who will you choose?
Li Cheng woke up and became the deceased Bai Yueguang "Lin Wei" in his memory. The mole in the corner of her eye was hot, reminding her that this was not a rebirth, but a dangerous "consciousness projection". She was forced to become a "lock" and struggled to survive in a strange world, but she met the person who also shouldn't exist - Lin Hai.
Lin Hai's arm was branded with a scarlet anchor mark. He is the "key", an experimental subject who was forced to escape, and the younger brother of the gentle senior Lin Jiang in her memory. He looked at her with complicated eyes: "You are not her. But we must cooperate to survive."
A burnt notebook and a series of mysterious coordinates lead them to the abyss. They found themselves involved in a space-time experiment that had been carefully planned for ten years. As the only successful "keys" and "locks", they are destined to face a cruel multiple-choice question: when the "door" to the past or future is opened, the energy is only enough to push one person - the other person will become fuel, the consciousness will be annihilated, the imprint will be peeled off, and completely disappear from all timelines.
The ghosts wandering in the cracks, the forces watching in the dark, the vague warnings in the notebook... Every step may be a trap. What's even more deadly is that the manipulator hiding in the dark seems to have anticipated everything.
"The three phases are unified, and the door begins to open." - What is the third phase they are missing?
Struggling on the edge of countless time and space rifts, traveling through the fog of memory and identity.
