Every 100 years, the battle of 100 children-demons go to Earth to compete in the battle to become the king of the world of demons. Each demon connects with the human satellite, which receives the book of spells of a certain color. A person can impose a demon spells through his book. If the book of the demon burns, it disappears and returns to the world of demons. The last remaining demon becomes the king. The show focuses around Gasha Bella and his satellite-man Takiaca Kiyararo. De Visa: To his 14th birthday Kiyo received a strange boy named Zetch Bell as a strange gift from his father. Kiyo soon discovers that there is more in ZATCH than his father understood: Mamodo's ZATCH-boy with magical abilities that are unleashed when reading spells from a mysterious red book ...