Terk edilmiş bir Yıldız Filosu gemisine rastlayan bir grup genç maceraperest, galaksiyi keşfetmek ve acımasız bir hükümdarın pençesinden kurtulmak için güçlerini birleştirir.
The Invaders, alien beings from a dying planet. Their destination: the Earth. Their purpose: to make it their world. David Vincent has seen them, for him it began one lost night on a lonely country road, looking for a shortcut that he never found. It began with a closed deserted diner, and a man too long without sleep to continue his journey. It began with the landing of a craft from another galaxy. Now, David Vincent knows that the Invaders are here, that they have taken human form. Somehow he must convince a disbelieving world that the nightmare has already begun.
Genç Johnny, cesur ve heyecan doludur. Johnny’nin dahi ikiz kız kardeşleri Susan ve Mary, Johnny’yi çılgın bilimsel deneyleri için deney faresi olarak kullanırlar. Eğer akıllarına bir şey gelirse, Johnny onu yapar; tabii genetik olarak geliştirilmiş süper köpeği Dukey de yanına gelebilirse.
Newspaper reporter Tim O'Hara finds a crashed alien spaceship that contains one live alien. Not wanting to be discovered by the authorities, the Martian assumes the identity of Tim's Uncle Martin and begins to repair his spaceship so that he can return to Mars.