Mr. Kwak is an ordinary green frog, which is very different from his relatives in that he is even afraid to get close to the water. Of course, this behavior causes laughter among his brothers, who constantly mock him. So Kwak becomes an outcast, supported only by Sandy's flying squirrel. She absolutely does not care that he is not like the others, because she was able to discern something more in him. Soon Kwak learns that in fact he is a real prince, who was once enchanted by an evil witch. Now he is ready to do anything to remove the spell, but for this he needs to find a beautiful young girl whose kiss will return him to his true condition ...