12-year-old Mariana and her stepbrother Marcus end up in a home-built rocket. Behind the rocket construction are Albert, a slightly crazy scientist, and his helper Lemming, a talking lemming.

Robert Gustafssonas Albert Mann
Theodor Haraldssonas Marcus
Kim Sulockias Lemming (voice)
Jennie Silfverhjelmas Lisa Connor
Olle Sarrias Basketball Coach
Hedda Stiernstedtas Mariana - 26 years old