At some point, a fish factory was opened in an unnamed town, the resources for which were extracted from the local river. Life went on as usual. But after a while, during fishing at the bottom of the river, something resembling the worst nightmare of every resident of the town was discovered.

It was then that a mysterious detective with a difficult life story full of losses and losses appeared in the village, the cause of which was himself.  He has to atone for all his sins by opening his own detective agency and solving this case. This is the only way he can forgive himself.