Author's note about this spoiler
So you want to know exactly what the content of the film is before you
watch it? Maybe you're concerned it's not safe to watch? Well
if that were true, how do you know I wouldn't lie in this discription of
the film?
The complete plot
Some Lego people decide that they must do something, and decide to invade another planet. They pick our planet Earth.
They set off in a space ship, and build a transmat pad when they get here (for quicker arrival of the invasion forces). But they didn't quite get the scale right when picking the planet, and turn out to be midgets compared to the natives.
One of them meets their maker, thanks to a cat. And another of them gets their space craft stepped on, by a passing human; who then, later on, unwittingly walks on the transmat pad and loses his shoe.