Liu Ruyan, a female cultivator of the Drunken Flower Sect, overwhelms all her rivals in the sect competition and makes a shocking request to the Cangyun Sword Sect: to spend one month with Xiao Yan, the Venerable of the Ruthless Dao. Xiao Yan has cultivated the Ruthless Dao for three thousand years. Cold and aloof, he has never allowed anyone to get close. Yet Liu Ruyan approaches him with diligence and sincerity, seeking his guidance in swordsmanship every day and accompanying him in cultivation. Her warmth gradually melts his icy exterior. As they spend time together, her cultivation advances, while Xiao Yan is deeply moved by her, and his unwavering Daoist heart quietly begins to waver.