The Little Ice Age at the end of the Ming dynasty left countless refugees homeless. Guan Er, a bandit who posed as an actor, heard that the Western Regions' Sea of No Return held treasure that could be used to help the refugees, and had long yearned to seek it out. One day, after a performance, he met Lu Sanchi, who called himself "Three Obsessions." After getting drunk, the two vowed to seek the treasure together. But then Mount Guan was massacred, and the tragedy turned out to be closely connected to Guan Er's master. The legendary three-volume martial arts manual, the Heavenly Book, was hidden in three paintings, and Guan Er and Lu Sanchi set out into the martial world to find it. By then, rebellions were breaking out across the land, all seeking to overthrow the court. A mysterious young woman appeared and befriended Guan and Lu, swearing brotherhood with them. The three compared themselves to the Three Heroes of the Dust of the Tang dynasty. The mysterious girl secretly fell in love with Lu Sanchi, but he remained unresponsive, unable to forget the love he had left behind…
