MUNKI the monkey (David Menkin) and his best friend TRUNK the elephant (Ina Marie Smith) wake up one morning to discover a stegosaurus in their jungle. They soon find out why it’s there: Their alien friend FNEEP the alien (Ed Kear) and his father GROGON THE UN-CONQUEROR (David Rintoul) are trying to go back in Ime to stop their cave-alien ancestors from conquering the universe.

Munki, Trunk and Fneep lig the stegosaurus up to the Ime-hole and drop it back into the past. Unfortunately, Trunk also falls through and ends up stuck in the prehistoric swamp. She makes friends with TIPTOES (Jenny Stead), a Nessie-like plesiosaurus who’s scared of water, TREY (Rob Van Vuuren), a tyrannosaurus who is extremely proud of his ‘mighty arms’, and a host of small, hyperacIve velociraptors. Meanwhile, Gorgon’s plan to tell his ancestors not to conquer the universe goes very badly when he accidentally gives them the idea to conquer the universe. The cave-aliens come to take over the Earth, led by their mighty chiegain ZOOG (Sandra Dickenson).

The whole of history changes, and in the present, Munki finds himself trapped in an alien zoo! Munki and Trunk are separated across Ime and space, but that won’t stop them. They know each other so well that they’re able to collaborate across the centuries. They work out how to get Munki to come back in Ime, too. He tries to rescue Trunk, but he quickly gets caught by the cavealiens, and it’s up to Trunk to rescue him! Trunk mounts an epic rescue mission with the help of her dinosaur friends. But in the end, it’s Munki and Trunk’s friendship, generosity and love of music that teaches the cave aliens a beNer path and sets history back on track.