FOR THIS KILLER, IT`S A GAME OF A B C When the body of a man is found brutally murdered in a wildlife park and tattooed with a letter A, criminal profilers Jan Grall and Rabea Wyler are thrown into a deadly game of cat and mouse. Later, two more mutilated bodies are found, again with tattoos on their skin - B and C - and it becomes clear that Grall and Wyler are dealing with a brutal serial killer. One who won`t stop until his set is complete. When Grall`s hotel room is marked with a Z and his girlfriend kidnapped, the race is on to find out who the killer is. Before it`s too late . . .