Lin Xuanzhen, the 'Champion Marquis' who strikes fear across the North for the Tang Kingdom, conceals his true identity to marry into the Jiang family as a 'mute赘婿'—enduring humiliation while secretly protecting his wife and daughter in his quest to uncover the truth behind his mother's death. Facing relentless persecution from his mother-in-law and ruthless oppression by the merchant guild, he swallows his pride—again and again.