Ronan Boyle is the youngest and most humble recruit of the secret police department, which investigates the crimes of magical creatures. Ronan's parents are in prison, and he is convinced that leprechauns are to blame. Despite his small stature, poor eyesight and gentle character, the guy is determined to reveal the truth and free his relatives. But not everything is so simple: cunning hair dryers, sinister goblins and a whole world of monster criminals stand in his way. To resist them, one young servant of the law may not be enough...