Bullied by classmates, young Max (Cayden Boyd) escapes into a fantasy, conjuring up the action-packed lives of Lavagirl (Taylor Dooley) and Sharkboy (Taylor Lautner). But one day, Lavagirl and Sharkboy suddenly come to life -- and their world, Planet Drool, needs a hero named Max. As Max escapes to Planet Drool, he battles aliens and tries to save his new friends' planet from destruction. He also battles his bullies, who have become villains like the Ice Princess (Sasha Pieterse).