A story that follows two couples who mistakenly find themselves in a marriage they never expected and gradually grow in love and trust over time. The cheerful and clever Xiao Wan Zi grew up as a street performer with her dad selling their special skill of breaking a big stone on the chest. An unexpected encounter utterly changes Xiao Wan Zi's life. Xiao Wan Zi who neither knew how to read nor write suddenly finds herself becoming a princess. Opposed to marrying the princess, Mei San Shao pushes Xiao Wan Zi away in hopes that she'd willingly retreat. Meanwhile, the king has arranged a marriage for Lu Ying Yao, the daughter of the 9th prince. However, bandit Xiao Bao Ye mistakenly takes her as his wife.