Certain Shadows I Have Known tells the tale of a hitman employed as a shadow stalker by a superstitious and vicious mob boss.

A shadow stalker deals primarily with supernatural menaces, and when the new assignment comes with a silver bullet as well as a timetable based on the next full moon, the brutal threat is obvious. But even as the shadow stalker attempts to dispatch this target, he finds himself followed by mysterious paranormal forces resulting from a previous assignment. A computer sprouts fangs and attacks him, while enigmatic figures shadow his every move. This plays havoc with his work, resulting in a siege of his boss’ mansion by vicious monsters, who refuse to leave the shadow stalker alone. His salvation resides in the aid of a wizard and a deadly voyage aboard a supernatural train, where he must confront his inner beast in a fatal battle