The Berlin office of the world's most renowned investigation firm looks into the disappearance of an agent, Chris Schneider, whose last case involved an unfaithful billionaire, a cheating soccer player and a seedy nightclub owner.

Fifteen-year-old Daniel has followed in his parents' footsteps as the Alien Hunter, exterminating beings on The List of Alien Outlaws on Terra Firma, but when he faces his first of the top ten outlaws, the very existence of Earth and another planet are at stake.