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Winning a game of Mahjong is hard; getting the same score every time is practically impossible. So imagine the surprise of the school Mahjong club when Saki Miyanaga walks in and does just that. Despite her dislike for the game, her talent is obvious and it's up to the club members - the top-heavy Nodoka, the energetic Yuuki, the cunning Mako and the permanently in control club president Hisa - to persuade her to join the club and help them reach the Nationals. But even then, will their combined skills be enough to overturn some of the toughest high school players the country has to offer?