Fourth grade is about to begin for Ava K, her best friend Kimmy, and their arch nemesis Bratty Brian Brooks. The 1st day of school starts off pretty typical ("boring"), until the "Prankiest Prantsters" strike. Everyone is wondering who did it. Ava K, the self proclaimed "Ladybug Detective" springs into action. She enlist the help of her best friend Kimmy, and they vow to solve the case, and expose the "Prankiest Pranksters". However it won't be as easy as they thought, thanks to Bratty Brian Brooks.