a caterpillar was caught in a bottle. he tried to get out, but he couldn't. a mantis flew over to the room and thought how he could help him. he found that he could do nothing and told the caterpillar to give up. after that, the mantis was caught and the bottle was capped. a butterfly flew over to the room with his friends, fireflies. they spun around the bottle and opened it. the mantis could escape from the bottle. maybe the butterfly used to be the caterpillar in the bottle.
i think the theme of this film is a kindness that doesn't seek a favor in return.