An unknown crisis descends; young people from every nation are chosen as challengers, and their performance determines the fate of the homelands behind them. The Dragon Nation, at its lowest ebb, sees the arrival of the young man Lu Yan. He can see through the truth and falsehood of every rule, yet he chooses the most difficult path—he will not trade companions for shortcuts. Instead, he will uncover the hidden truths behind the rules, and untie the knots in the hearts of those trapped within the levels. In the school infirmary, the library, the graduation auditorium—again and again he turns desperate situations into perfect scores, leading the Dragon Nation from the bottom of the rankings all the way to first place in the world. In the final level, he extends his hand to opponents from all nations: the true password to clear the game is kindness and unity.