In a large forest clearing, Beaver, a short furry animal with a big ego, inaugurates his masterpiece: a giant dam. With the help of two Rats, he blocks the flow of a river. The water level rises and in no time at all, a giant lake is formed. Beaver is very proud of himself but, to his disappointment, there is no one to admire his feat. Elsewhere in the forest, Fox and Hare have been throwing a party with their friends. After the party, Owl returns home and discovers strange streams of water flowing past his tree. He panics and flees into the forest. The following day, Fox and Hare discover that Owl is missing. They set out with their friends to find him, but instead discover the mysterious lake. Where has all the water come from? While they continue to search for Owl, the water continues to rise, threatening a flood. Their quest to save the forest will test their friendship to the limit!