The Mézga family goes on a camping trip to Baranyaberenye. However, the motorbike cannot fit all the luggage. They get Máris's neighbor's party car as a trailer. Yes, but it also starts to rain. Öcsi needs help here, who sends a weather control device (meteoro-muto-motor) to Géza with authorization from the space authority. However, manipulating the weather comes with serious responsibility and consequences.