In the year 200x everone has a invetion called the PET. It is a cell phone, a computer, textbook, newspaper, and more! On top of that every PET contains an Artificial Intellegence called a net navi that can do many basic tasks for his net-operator, the owner of the PET. Due to rampant computer viruses, net-op's equip their net navi with battle data called battle chips and fight the viruses in a process called Virus Busting. Lan Hikari is a not-so-normal kid, whose father is a world-renouned scientist. His net navi is named MegaMan.exe. Together they are a very formidable team! With the help of their friends, Lan and MegaMan defeat forces that threaten to take over, or even destroy, the world.