After a surprise family trip to Ferngully derails Zach's birthday plans, he is determined to prove he's old enough to do his own thing – even if it means reuniting with his fairy childhood friend Crysta, meeting Pips, Batty Koda, and other humans like Zak Young and Budgie, and see his childhood crush Luanne Platter, face an evil Hexxus, and confronting an ancient preteen demigod whose angst has apocalyptic potential also reveal to be Zach’s sister!