Nessie Jr. lives a well-protected life in a cave system below the North Sea. His grandfather, the legendary Loch Ness monster, had to leave the lake before Junior was born to protect the herd from the obnoxious and dangerous behavior of the humans. The old pachyderm wants Junior to lead the herd out of exile and back to their old home. But Junior is not interested. So one day, his grandfather decides to trick him out of his comfort zone. He takes him to his old home, but with terrible consequences! Junior gets caught by idealistic Dr. Kellina Duncan and brought to an animal sanctuary where he meets many other mystical creatures from all around the world...