It's a lonely life a professional videogamer leads, especially when you have become unbeatable. It's hard to break the boundaries of your abilities when you have no one to push you.  

But when an anonymous gamer comes out of nowhere, dominated and surpassing all other gamers, Jongin finds himself drawn to beating this person; bent on defeating him and taking the others mask with him - no matter how long it takes.

It can't be an addiction if it's unknown to the addicted...