In a disordered future city, the young boy Shi Yuan is trapped in an unbreakable time loop. Every time he wakes up in the morning, the cracks in the city are widening, and human memories are quietly erased. Shi Yuan is the only person who can detect the changes in the world. His motive is not to escape, but to solve the mystery of his parents' disappearance. The quantum diary they left behind hints at greater conscious control behind the cycle. As time resets, Shi Yuan gradually discovers that he is at the core of an inter-dimensional experiment, and everyone is a sample under observation. The core conflict is that he must break through the cycle and awaken the forgotten truth of the city in the limited days and nights, while at the same time contending with the fear of his own memory gradually disappearing. The story uses a fragmented time and space narrative, integrating virtual reality and brain-computer interface technology to show how young people use memory and will to fight against the control of the macro system. Every reincarnation is a challenge to self-awareness and future destiny - can Shiyuan regain the forgotten past for mankind before the world returns to zero?