JoJo and Skeebo are enjoying a fireworks display from the backyard of Skeebo's house. As they wait for the grand finale, Fire Chief Seltzer serves up dessert. There are many tempting treats, including banana-cream pie and merry berries - an extremely tasty type of berry that JoJo is unfortunately allergic to. Not wanting to miss out, JoJo decides that she should be okay with just a few. It soon turns out that she's not okay - she soon has a strong allergic reaction, with her skin turning pink, tingling and itching and her nose swelling up.