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In the year 2022, the Virtual Reality Massive Multiplayer Online Role-Playing Game (VRMMORPG) Sword Art Online (SAO) was released. With the Nerve Gear, a VR Helmet that stimulates the user's five senses via their brain, players could experience and control their in-game characters with their minds. But, in an unexpected turns of events, the creator of SAO prevented the players from logging out. The creator issued them a challenge; if they wished to be free and log out of the game, they must reach the 100th floor of the game's tower and defeat the final boss. However, should their avatars die in the game, so would their bodies in the real world.