Summer begins. Tomás and his friends have no plans, they will spend the summer at home again, but this is not going to be just any summer. To entertain themselves, they follow Tomás’ father, a student of the paranormal world. In this way, they will discover a fantastic being of their age, from an unknown world: Atlantis. Between disbelief and fascination, they will help him, through countless adventures, to return to his world, his lost city, along with his family and thus save its citizens from a terrible end.