A two-way rush across time and space, a passionate and warm trading story. Li Sheng, a modern girl who has fallen into the trough of her life, accidentally owns a magical inn that can connect to ancient times. Thus, she meets Xiao Chen, the Prince Qi of Great Jing, whose seven thousand soldiers are trapped in a desperate snow-covered mountain with exhausted provisions. With the isolated army besieged and powerful enemies pressing the border, Xiao Chen remains calm, decisive, and caring for the people. Having experienced the vicissitudes of life, Li Sheng transforms into an exclusive provision officer, lending them a helping hand with modern supplies and wisdom. Relying not on gratuitous gifts, the two trade goods of equivalent value, slowly building trust and appreciating each other through repeated exchanges.