Jack has the extraordinary power to transform into the animal of his choice and to communicate with all wildlife. Mammals, reptiles, amphibians, fish and birds, all the animals in the world have a special place with the cikavac. While he spent the night watching shooting stars with his friends, Jack realizes that Floche, his firefly friend, has disappeared. Without waiting, he also transforms into a lampyre and goes looking for her. Attacked by a curious mutant insect, he falls into a spider's web. Prisoner, tiny and defenseless, he realizes that he is now unable to transform.