Team Sonic the Superhero Girls (Wonder Woman Batgirl Supergirl Bumblebee Zatanna and Green Lantern) must team up with the Supervillain Girls (Livewire Poison Ivy Star Sapphire Giganta Catwoman and Harley Quinn) to fight to stop Megatron and his Decepticons from conquering the Galaxy with a deadly new weapon, but first the Blue Blur himself must come to terms with his past.