In the sixth year of Emperor Yongzheng's reign, Batu travels to the Qing Dynasty with his brother and cousin for a marriage alliance. Along the way, he has a misunderstanding with Cai Die, the daughter of a noble. When a series of mysterious disappearances occur, Batu and Cai Die team up to investigate and eventually fall in love. They uncover a conspiracy involving a group called the Twelve Hairpins and expose the mastermind behind it. Despite the ongoing mystery of a treasure, justice prevails, and Batu and Cai Die marry, finding happiness together.