Frankie and Madame Foster are leaving for the day, so Mr. Herriman is placed in charge of the house. However, Madame Foster inadvertently gives Bloo the idea to throw a wild party, and he plans to do so without Mr. Herriman’s consent. While they manage to come up with a method to distract Mr. Herriman, there is still one person that could stop the party: Mac. Bloo knows that with a little bit of sugar, Mac will not be a problem, or so he believes. Instead, though, one small drop of sugar turns Mac into a sugar-crazy maniac, and Bloo must stop him before he ruins the party. Meanwhile he finds even more to worry about, including Mr. Herriman coming to his senses.