In a clearing in the forest, Beaver, a very vain little animal, unveils his great masterpiece: a dam. With the help of two rats, he blocks the stream’s flow, causing the water level to rise, flooding the forest and quickly forming a huge lake. Beaver is very proud of his creation, but he is disappointed because no one is there to admire his masterpiece.Meanwhile, in the forest, Fox and Hare are having a party with their friends Crest, Pingui, Jack, Seal, Mermaid, and Owl. After the party, Owl returns to his tree for his usual night watch, but he suddenly realizes that his tree is surrounded by streams of water. He panics and ventures deep into the forest until he sees a massive lake that wasn’t there before. He is so astonished that he faints, and as the water level keeps rising, he floats into the lake and is carried toward the dam. A strange creature he has never seen before welcomes him. It is Beaver, who is delighted that Owl has made it to his burrow. Finally, someone can admire him! The next morning, Fox and Hare realize that Owl has disappeared. They search for him with their friends, but suddenly, they discover a lake they have never seen before. Where did all this water come from? They deduce that Owl must be somewhere in this vast body of water.As they search for Owl, the water level keeps rising, endangering the forest and their homes.Beaver must destroy the dam to save the forest, but is he willing to do it? And at what cost?