Su Yu, the second son of the Marquis of Zhenbei, has endured fifteen years of patience, pretending to be a spoiled wastrel while keeping a low profile in the world, all to uncover the truth behind his stepmother's murder of his mother. When Princess Jinning holds a martial arts contest to choose her husband and expert warriors from rival nations arrive to humiliate the kingdom, he steps forward in its hour of crisis, crushing powerful enemies and shattering the schemes of his stepmother and her son. Repeatedly framed by Chancellor Lü's faction, he reveals his identity as the righteous hero One Plum Blossom, cleverly foils their plots, exposes the real culprit, clears his mother's name, and secures his position as the princess's consort.