Blupi leads a quiet life on his planet until a strange meteorite crashes in a desert area.

Only much later does Blupi realise that his crops are being destroyed by huge spiders. Though he's always been a tough and healthy type, a weird virus has been causing him to sneeze and cough a lot lately. What's going on?

In fact, the meteorite is a spaceship. The only passenger on board is a mean-looking robot. Its goal is to build factories that produce a variety of aliens. Help Blupi use the resources of his beautiful planet to chase these invaders away!