The film is set on the spaceship Polaris II, which is heading towards planet Mars on a rescue mission. Professor Leon Nordheim and his female assistant Smitty (full name unknown) are hoping to rescue the missing crew of a previous spaceship: Polaris I. Jimmy Perry. the young son of the lost spaceship's pilot, joins Polaris II as a stowaway. During their mission, Nordheim delivers basic lessons of astronomy.
