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 Wanzi 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 Wangzi's life. Xiao Wanzi who neither knew how to read nor write suddenly finds herself becoming a princess. Opposed to marrying the princess, Mei Sanshao pushes Xiao Wanzi away in hopes that she'd willingly retreat. Meanwhile, the king has arranged a marriage for Lu Yingyao, the daughter of the 9th prince. However, bandit Xiao Baoye mistakenly takes her as his wife.