Pottan is going to a riding camp, but ends up at a recycling center where she is taken care of by the strange staff. One day Pottan finds out that the staff are building a space rocket.
Lasse and Maja find an old mysterious coffin that turns out to belong to the eccentric family von Broms. A centuries-old family fights flare up again and suddenly the coffin gets stolen. Who wants to steal it and why?
