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 and voyeurism that someone is willing to kill to keep hidden ...