After aspiring novelist Jake Conley regains consciousness from a coma, he discovers he's affected by synaesthesia, and that his now cross-wired brain endows him with heightened psychic powers. Jake's research on the Northumbrian King Aldfrith takes him to Elfrid's Hole in North Yorkshire, where - as legend relates - the king sheltered after a bloody battle. What Jake doesn't realize is that his investigation has unleashed a series of deadly...