Being teased for his color, Johnny the white koala joins a traveling carnival with Hamish, a Tasmanian devil, and Higgens, a photographer monkey as talent agents. On the way through the Australian outback desert, the trailer they are in comes loose and crashes. Johnny must live up to the hero status Hamish presents him as while the outback locals try to rescue a kidnapped koala from Bog, a giant crocodile and his dingo lackeys.

When a daredevil kid named Ernie, his sister Julia, and his best friend Max are horsing around in Max’s inventor father’s workshop, they accidentally trip a time-machine into operation and find themselves transported back in time 65 million years, where they meet a T-Rex named Tyra and her rambunctious dinosaur son Dodger. The unlikely group find themselves on an amazing adventure exploring the lush prehistoric jungle, despite Tyra’s evil dinosaur rivals conspiring against them – while, back in the present day, Max’s dad and Ernie and Julia’s overprotective mom plot their rescue.