Lieutenant Jonathan Stride knows his partner Maggie Bei is in trouble when she reports a deadly crime on a bitter winter night. She's obviously hiding a terrible secret, and her silence only feeds suspicion. Maggie isn't the only one keeping secrets in Duluth. A seductive young woman has disappeared, leaving behind a stash of lurid fantasies and a cryptic message: "I know who it is." Following a twisted trail, Stride uncovers a sordid web of violence...