Oliver, a beaver, decides to build a ship and leave his pond to look for greener pastures, but finds that all his animal friends want to accompany him.
After the murder of his father, who has been hiding under the Witness Protection Program, Pete finds himself the target of sinister men who seem to think he knows where a large sum of money is hidden.
When a large box is delivered to Duncan while he is away, the other animal inhabitants of Mud Flat are consumed with curiosity about what might be inside.