Long Yanyan, the shopkeeper of Yuelai Inn, and Feng Kechui, a talented artist in the art studio, were originally a loving couple.But their true identities are the rival killer Chi Yan and the pursuer Leng Feng.In order not to bring danger to each other, the two concealed their identities. In order to spend the rest of their lives together, they decided to withdraw from the world, but they must first complete the last task for their respective organizations - to recapture the mysterious Peacock Box.

The two battled wits and courage for this task, but gradually discovered each other's true identity and began to doubt who the other party was.The two tested each other and fought with each other, but they were gradually involved in the whirlpool of conspiracy.