On Poppy's birthday, Branch is ready to make a big leap in their relationship, but uninvited guests ruin the special occasion. Power hungry aliens known as Nebulons abduct Poppy on her special day searching the happiest troll of all. And the reason? You'll have to read and find out.

After the events of Battle for Volcano Island, everything is at peace for the wise old crab and his people. That is until someone releases the Mawgu from his imprisonment. This becomes a serious problem when the Mawgu takes the wise old crab hostage. Now it's up to his grandson Shellton to summon forth new Heros. When he summons them, It's now up to, Dj and Jennifer Fenton/Phantom (the children of Danny Phantom), Tammy and Tommy Turner, (The children of Timmy Turner), Winston Neutron, (the son of Jimmy Neutron),Sparx (Jimmy's latest invention),Crash, Tyler and Twitchy(the children of Spongebob Squarepants) and a new friend named Mika to save Volcano Island,and stop the Mawgu once and for all.But someone has plans with the Mawgu himself.