When Circus Zampano comes to town and strange things start happening during the juggling act, Klooz is hired to investigate.

When a new boy comes to town and starts taking cases away from Klooz, they decide to have a duel to find the best detective in town.

While celebrating his eleventh birthday with his mother and his friend Olga, Klooz relates the case that started his detective career, which involved magic balls, and a boy named Snake who was his best friend.