Koichi lives an ordinary junior high schooler's life, until one day when the computer of the Tower of Babel authorizes him as a master of the tower. Koichi is actually a distant descendant of the space alien Babel, who was cast ashore on Earth 5000 years ago. Koichi inherits Babel's superhuman intellect, physical strength and other various supernatural powers. He leaves the Tower of Babel with three servants following him. With their help, he confronts Yomi, a man from the Himalayas who seeks world domination.