 The Grimms have come up with a  hunting technique  for the clumsy king Jozef: they throw dead chickens down from the tower, which he shoots trough a window. Before they can properly test it, the royal family s attention is taken by a three-legged visitor in a jester suit who announces himself as the title character (it means roughly pranks spectacle magic joker), or  -jas  (Dutch for coat) for short. He is less entertaining then he announced, but the king is in the mood for any fun once he has ordered Kulderzipken to leave the next day, and accepts the following trick starting with tieing them up- only to find it s all a cover for the jas and his two sisters, whom he now lets in and capture the Grimms, to rob his treasury. Kulderzipken escapes and turns to the devil, who helps him after his mother forbade it as not evil enough by scaring the robbers into an oubliette.