One is the high priest of the Xijiu tribe of the lost country, and the other is a rogue gangster who accidentally traveled to another world and became the puppet crown prince. The two met awkwardly, and gradually developed a good feeling while working step by step. Unfortunately, in the era of intrigues and chaos, no one could take this relationship into consideration. A promise worth a thousand gold, a promise worth a thousand gold, can the two keep their promise to each other and stay together forever?