Phoenix “Nix” and Jean-Luc have been best friends since kindergarten. On their way to Swashbuckler Elementary for the first day of fifth grade they meet Earth Blossom “Eddy” a precocious kid who has lived his entire life on communes and environmental retreats, who is also in their class. The three become fast friends. All is not well in Bellybutton. The adults have been acting strangely and the curious friends decided to try solve the mystery without getting grounded.