In 2048, the Lingyun system, serving as the first case of "smart brain popularization application," is piloted in the city of Mirage. The accident at the Lingyun system conference that day sparks an emotional entanglement among its founders, Zhou Tong and Zhao Feibai, and childhood friends Ayigul and Aizmat. To achieve his goals, Zhou Tong traps the "brain consciousness" of Zhao Feibai, Ayigul, and Aizmat within the sandbox space of the Lingyun system, but inadvertently triggers the activation of the system's "initial intelligent AI" - Lucoco. Everything ties back to the "imprint" game in the memories of the four individuals from that year, as an intelligence crisis coded "human heart fetters" unfolds between the real and virtual worlds.