In the "long river of life paths" intertwined by millions of parallel life paths, the tracer can use blood as a guide to glimpse the afterimages of other people's memories, but it will also leave irreversible "time scars" in reality. Young Lu Chen possesses the forbidden ability "Ten Thousand Paths of Shadow Tracing", which can forcibly reverse his fate. However, he was hunted down by the mysterious organization "Reverse Time Sect" when he was young. His memory was broken into hundreds of "fate fragments", each of which hides the bloody afterimage of his farewell to his mother.
Yun Yanqiu, the feared "Silver Butterfly Hunter" in Suguang City, turns out to be the 37th generation saint of the Shiji Cult. The butterfly-shaped birthmark at the end of her eyes shimmers under the moonlight. The moon-tracing butterfly blade in her hand can cut away the afterimage of her destiny, but it also cuts off the fate that has been entangled with Lu Chen for fifteen years - from picking him up as an infant in the snowy night to holding a knife against his throat under the blood moon. Each of her saintly marks is "weaving a cocoon" for his destiny. When "Blood Path Murders" occurred frequently, the pupils of all the dead reflected Lu Chen's hand holding a knife. When Suguang City collapsed in the "Time Rainstorm", Lu Chen found the "Fate Path Star Map" left by his mother in the city lord's palace: his life path was divided by twelve cloud-pattern chains, and Yun Yanqiu's saintly mark was stuck on the core chain. Sneaking into the disguise of the Time-Reverse Temple, he saw floating in the furnace the fragments of her destiny she had stripped off for him thousands of times, each piece engraved with "Protect Xiao Shen"; when looking back on her memory, he fell into a cycle of ghostly shadows in the mirror. In thousands of worlds, she was either a saint, a peasant girl, or a killer, but after meeting him...
