Chen Mo, a retired special forces soldier, is now a private detective dormant in an old shipyard. He has a pair of eyes that can see through ashes, and a set of analytical tools whose origins are mysterious. When Liu Yifei, a beautiful consultant from the Municipal Procuratorate, came to his door with a bizarre murder case, he keenly smelled the atmosphere of conspiracy.
The deceased was a business tycoon, and strange symbols and special ashes were left at the scene. The official verdict was that the death was sudden and unexpected. But as the investigation deepened, Chen Mo discovered that this was not an isolated case - in the past three years, the shadow of the same organization was vaguely behind many murder cases packaged as "suicides" and "accidents".
He formed a temporary team with his upright assistant Li Dachui and the thoughtful Liu Yifei to pursue the truth among the Rainy Night Gallery, high-tech parks, and abandoned laboratories. Carefully designed ashes are left at every scene, and every deceased person has touched a secret called "The River of Forgetfulness".
This is an organization that specializes in "erasing" insiders. They use perfect crimes to clean up memories that are not allowed to exist. As Chen Mo gradually approached the core, he discovered that even he was involved in a shocking conspiracy about memory manipulation.
In a city of rain and flames, they must race against this invisible monster to uncover the truth buried beneath the ashes before the next victim appears.
