Heiss is in the same class as the confident and mysterious Ditzy. Heis is thrilled when he learns that Diti is interested in him. She tells Heiss that she is a member of a secret club and invites him to join, but on one condition: he must agree without knowing anything about the club. Heis decides to take the risk. In the middle of the night, he sneaks out of the house for his first secret mission: to rescue a rabbit. Although not a true animal rights activist, Heiss begins to take part in the All Animals Alive and Free Club's animal rescue campaigns.