Peggy the Stegosaurus doesn't have any friends. Peggy is different. Instead of spikes on her tail,
she has one right in the middle of her forehead.

But when she meets a tiny triceratops named Steve, and a talking rock from outer space, she learns that what makes them different also makes them strong.

And together, they may be their planet's only hope, as the three friends set out to stop a meteor from ending all life on prehistoric Earth.