When the whole town of Blackwood, Minnesota loses power, a man called the Silhouette goes on a murser spree. Mara Bell and Tessa Ward have to solve what is going on. Season 2 continues the story in NYC, when the Silhouette goes on another spree. Season 3 ends the show when the Silhouette goes on a final killing spree back in Blackwood, where the Silhouette meets their end.