Background. 

2051. 

Everything has been dependent over the device known as GreyMatterLink or GML for short. Others have called this device BrainLink. This device installs a personal computer in the brain and can access the Internet anytime, anywhere. This device has revolutionized the lifestyle of Koreans. All kinds of handphones and personal computers have been replaced by this device since it is an all-in-one devicethat has access to the brain. This device makes an extension of the brain to the Internet. 

It has been part of everyday life ever since. In subways, passwords, communications; everything has to have a relation to GML, even the world of gaming. It made everything more realistic with the help of an upgraded Internet. The players would feel the game itself, and every single game has been virtually involving the player itself ever since. 

Shin Hoseok is a hardcore gamer. He doesn't leave his room for he always plays the addictive multiplayer online battle arena which he mastered ever since he was a child. He is one of the legendary players and is famous for his power, yet only a chosen few knows his personal life. While playing, he is challenged by an concealed username, meaning he would know when he accepts. Confident with his power, he accepted the challenge, not knowing it would change his life completely.