Just when guardian Riley Jenson thought her life was getting back on track, fate throws another curve ball.

The alpha of her estranged pack - and the man who tried to kill her by throwing her off a mountainside - demands her help to find his missing granddaughter. Riley would love to refuse, but if she does, her mother dies. And if that isn't enough, something is tearing humans to shreds, and it's up to Riley to track down the killer before another soul is embraced by darkness.