A dark alley on a gloomy, and mysterious night, a floor made of wet cobblestone

A dark alley on a gloomy, and mysterious night, a floor made of wet cobblestones, with gutters running accumulated rainwater, a slightly torrential rain, someone with a hooded case distancing himself with steps of escape from something that is lurking around him, intricate, realistic, a blurred image of escape movements, nebulous and mucusy and twisted tentacles appearing in the corners of the mysterious street.