The series begins in the middle of a game of hide and seek, as a young boy named Justin Casey (Gen Adachi) finishes counting and begins searching for his friends Angela "Angie" Roberts and her little brother Corbin "Cokry" Roberts (Kanna and Tsukubo Natsuyama). As he searches for Angie and Corky in a wooded area, a storm occurs all of a sudden. Justin manages to sneak up on the two before the rain starts pouring, forcing them to run for cover. They eventually find a mysterious but strange looking house in the wooded area, previously unseen according to Justin. At first glance it appears that nobody is home, until they discover a battery type android named Solar Ion Robot (Kadenchin), or S.I.R. for short. They soon meet the owner of the house, Professor Humphrey Bumble (Dr. Tokio Taimu), who introduces the children to his greatest creation, a half rocket, half house one of a kind time machine namely The Flying House. Humphrey's attempt at recreating Benjamin Franklin's famous lightning experiment with the use of a kite flying outside the house to get the machine working only leads to a temporary change in S.I.R.'s personality from nice to mean and goes berserk before sending The Flying House on course for the past. Little did they know that Justin, Angie, Corky, and S.I.R. truly realize how long the journey back home will take due to Humphrey's misguidance and errors in time travel, but in the meantime they witness and participate (with little or no consequences) in numerous events in the Bible's New Testament, from John the Baptist's birth to the rise of the Apostle Paul.  Eventually, they make it home exactly the same way they traveled into the past in the first place. S.I.R. gets a knock in the head which, again, makes him go from nice to mean and go berserk and he attacks The Flying House. Ironically, S.I.R.'s berserkiness fixes it in such a way that it finally sends the whole crew back to their own time period, and the show ends, with S.I.R. changed back from mean to nice by the end of the trip.