What starts out as a school trip to the zoo for Fliss and her classmates ends up being the adventure of a lifetime when Fliss is magically whisked away to the Serengeti! There she finds a little lost lion cub, separated from its family, and Fliss is determined to reunite them. But with only a bottle of water, half a sandwich and her instinct to guide her across the plains, is she ready to face the wild?