An astute teen, Yuuki Asuna spends most of her time studying for her high school entrance exams. One day, she borrows her brother's virtual reality game, 'Sword Art Online, ' and finds herself trapped in its fantasy world. Soon, though, she learns the mechanics of the game, develops her swordplay technique and impresses a pro gamer who invites her to join the best players on the front lines. Is Asuna ready to swap her hard-earned education ethics for high-rank play in a virtual realm?