Anne Boonchuy and the Plantars intend to return to Amphibia to protect Earth from a coming invasion, but things change when a speedy blue hedgehog called Sonic bumps into their lives. Together, Anne, her parents and the Plantars keep Sonic safe from the nefarious Dr Robotnik, who plans to use Sonic's power for his own purposes.
Anne was back on Earth, however She and the planters were teleport to green hills Montana. Now Anne and the planters must team up with sonic and a new ally Tails, to stop the incoming invasion from king Andrias. But be warned Andrias made an new ally.