Lu Shuang, 25 years old, is a top crime scene cartographer. He is famous in the industry for his zero-error hand-drawn reproduction of death scenes. On the surface, she is rational, restrained and logical, but in fact she is deeply traumatized by the snowy night when she was five years old - her mother was strangled to death on the swing in the backyard. She witnessed the whole process but her memory is sealed, and she falls into a suffocating nightmare every time it snows. When the first 'swing strangulation imitation case' occurred in the city, the arc of the footprints in the snow, the twelve reverse twists of the noose, and the distribution of rust on the swing chain were exactly the same as before, and the task force was forced to use Lu Shuang to intervene. She formed an unconventional partnership with the intuitive detective Chen Yan. Among the Euclidean geometric symbols (golden section spiral, Möbius loop incision, asymmetric Klein bottle projection) deliberately left behind by the murderer, she gradually uncovered the truth that was actively erased by her childhood brain: her mother was not killed passively, but carried key biological samples. Ben and the encrypted log prepared to take her to escape overnight; Lu Shuang himself was the No. 0 Living experimental subject of the 'Prometheus Project' - his embryo was genetically anchored and artificially shaped by synapses. He was born with extraordinary spatial memory encoding capabilities and was also implanted with the irreversible 'Snow Triggered Amnesia Protocol'. The entire novel spans a three-year criminal investigation cycle, connects seven highly ritualized murders, and uncovers three hidden threads: national secret projects, transnational human data black markets, and hidden cleaning mechanisms in the judicial system. It ultimately points to a cruel proposition: When memory is a designed cage, is the truth still worth digging out with your own hands?
