"all my friends are heathens, take it slow" recently, an individual known as the happy faced killer, famous for the killing spree years ago, strikes again. niall is the lead detective in the happy face killings case, his heart stone cold and mind set on determining the murderer alongside his partner, roman. what no one in his unit does know, is that both detectives, along with a few friends in their unit, have some serious secrets of their own. but when a member of calvin vail's family, one of the wealthiest in the uk, is taken out, and when vail himself returns from estrangement, what the hell is going on?