'Thirty-seven years in the force and if I was allowed to choose just one thing to erase from my mind what’s inside that room would be it.' That’s what a LAPD Lieutenant tells Detectives Hunter and Garcia of the Ultra Violent Crimes Unit as they arrive at one of the most shocking crime scenes they have ever attended. In a completely unexpected turn of events the detectives find themselves joining forces with the FBI to track down a serial killer whose hunting ground sees no borders; a psychopath who loves what he does because to him murder is much more than just killing - it’s an art form.