The first series, Superbook (Anime Oyako Gekijo), begins at the home of a young boy named Christopher "Chris" Peeper, who discovers the ancient Bible named Superbook that can speak and send him, his friend Joy (Azusa Yamato), and his clockwork toy figure named Gizmo the Crusader Robot back in time during the events of the Old and New Testaments. The second series, Superbook II: In Search for Ruffles and Return to the 20th Century (Pasokon Travel Tanteidan), takes place two years after the first series, where Superbook falls onto a computer, giving anybody the ability to see into the past from Christopher's home via the monitor. Ruffles, his poodle, has managed to get lost in time, prompting Gizmo and Christopher's little brother (rewritten as his cousin in the English dub), Uriah "Uri" Peeper, to search for Ruffles. While Chris and Joy keep watch and control of the computer from the present, Gizmo and Uri experience the stories from the Old Testament solely.