A giant pie is sent to Pretty Big City to stop an asteroid, but the Mechas get to it first, end up eating the whole thing, and must come up with a new plan before disaster strikes.

The Singing Stone Heads are ready for a big performance at Big Old Boulder Museum, but there's a problem because the only sounds that come out when they open their mouths are sneezes.

Ranger Nat is stuck at the bottom of a crevice with no way to get up to safety. To make matters worse, the problem gets even bigger when Mecha Abby gets similarly stuck while trying to save him.

Zee is ready to launch his rocket into space, but the launch pad breaks during takeoff and the rocket is launched into the farm instead.

When Big Old Boulder begins to roll towards the museum while Berta is attempting to take a picture with it, the Mechas must do their best to help keep it stable and prevent a catastrophe.

It's Food Day in Pretty Big City, but when they unveil this year's statue, they realise the banana atop their banana split statue is not split.