Savannah Drysdale lost her monkey Cleo and she visited All Aboard Animals for a field trip and she thought she saw Cleo her monkey. She made a plan to break in with her friends and get her monkey back. They broke in and got Cleo and brought 40 other animals home with the kids. Klaus and Mr. Nasty found out who broke in and the kids had to make another plan on what to do with all the animals.