In a future city where memories can be stripped, stored and traded, Lin Mo, an amnesiac memory specialist, runs a memory office called "Jingshui Pavilion". Day after day, he seals up the painful or beautiful past for his clients, like a lonely watcher, guarding countless forgotten stories, but he can only find his own past. One day, a mysterious girl named Xiaotong broke in and asked to retrieve a memory that was classified as taboo. This transaction broke Lin Mo's peaceful life and involved him in a huge conspiracy constructed of lies and tampering. In order to find the truth, he must step into the most dangerous depths of memory and face his deliberately buried past.