Figaro enjoys the company of his best friend, his dog Rivet, until an accident resets the tin terrier, reverting the robotic dog to a puppy. Rivet's energetic, puppy-like behavior causes one catastrophe too many. Figaro attempts to train his tin terrier but this too ends in disaster. Furious, Figaro kicks Rivet out of the house. Then his fear of being alone kicks in. Desperate to have Rivet back, Figaro searches the town through his telescope and sees the metal mutt about to board a ship. Now Figaro must race against time to stop Rivet from leaving him forever.