A serial killer is on the loose in Hamburg, targeting dancers from The Acapulco, a club in the city's red-light district, removing their scalp as a gruesome trophy and replacing their hair with plastic wigs.

Chastity Riley is the state prosecutor responsible for crimes in the district, and she's working alongside the police as they investigate.

Can she get inside the mind of the killer?

Her strength is thinking like a criminal; her weaknesses are pubs, bars, younger men and dingy light, but as Chastity searches for love and a flamboyant killer - battling her demons and the dark, foggy Hamburg weather - she hits dead end after dead end, and it may be too late. For everyone...