Yuri, Lili and Matt get ready for a very special day. But their dreams go down the drain when they discover that the parents have changed their plans and are now going to the same summer camp together, with several children they have seen.
When a spaceship crashes to Earth and reveals a group of quirky little space aliens on the run for their lives, the "GadgetGang" kids-Gus, Phoebe, Francesco, Mitsue, Mary Ann, Banana and Tank-soon discover this won't be the boring weekend they had expected. They soon learn that in a point far from the galaxy, an evil warlord named Gana Golber has seized control of the Confederation of Planets and now all of the planets are in danger-including Earth!
To save the family from bankruptcy, Christopher Columbus convinces friends Leonardo da Vinci and Mona Lisa to go to a treasure island. On the trip, they are attacked by the Beast Nautilus
Regina, a lonely 65 year old who works on the neighborhood watch for the police in Copacabana, believes to have witnessed a murder in the building across the street, and ends up getting involved with the suspect in a potentially dangerous chain of events that will force her to take stock of her life.