In the year 200X, due to the rapid development of network technology, mankind has entered a new network era. Everyone carries a PET similar to a small personal computer, which is equipped with an artificial intelligence computer called "Network Navigator". The invention of PET and Network Navigator has brought many benefits to human life, but network hacking, virus transmission and high-tech crimes have also become increasingly serious problems. Mitsumoto is a fifth-grade elementary school student living in Akihara Town. When he was promoted to fifth grade, his father designed a personal network navigator, Megaman, as a gift. So he and his good friends at school formed a network navigator team to solve problems that occurred on the Internet. As a result, they found that the initiator of these mysterious crimes was the evil organization WWW. In order to stop the sabotage plan and virus spread of the WWW organization's network navigator, Megaman constantly fights against it. With the help of the mysterious man and Ijuin Enzan, Mitsumoto and Megaman bravely fight crime. Can the friendship and team strength of Megaman, Megaman and his partners defeat the evil ambitions of the WWW organization?