Hawthorne Smurf's birthday celebration takes place at the Cafe Bismarck in Hamburg, Germany while Cartier, Jacques and Pierre's cousins are celebrating his 29th birthday. As the days goes by while Pinault and his brother Steuben went shopping, he saw Nazis chasing the other groups and he had to go back to the apartment with his brother and the gang went in quickly before they get caught. Next, Hawthorne's pet Maddie goes missing and Bruno sets up a search party for Maddie. Will the gang able to find Maddie 3 months before World War II starts?