Mouseford Academy is planning a spring field trip to the waterfall in the forest, but angry bears are chasing people! Something strange is going on -- could Vissen be up to her nefarious tricks again? If Colette, Nicky, Pamela, Paulina, and Violet don't figure out what's happening, the whole forest could be turned upside down. But not even Vissia de Vissen can steal a waterfall -- can she?