Bo joins the brutal world of underground fighting to help a human competitor juiced up on Fae "steroids" that are sending him on blackout rages – and putting his son in harm's way. Meanwhile, the sister of the first boy she ever killed shows up and confronts Bo over her deadly past.

What Bo uncovers while investigating the mysterious disappearance of human backpackers threatens her own fine physique. Meanwhile, the new man in Bo’s life sets events in motion that force Kenzi to make a desperate choice.

The gang is forced to stage an intervention against an increasingly erratic Bo. Forcing Bo to learn the truth about secrets kept by the people she trusted most.

Bo and Tamsin infiltrate the world of college football to investigate a homicide that might expose the Fae. Dyson investigates a murder victim who won’t stay dead.