Modern woman Su Nuanuan stumbles upon a vintage music box that connects her to the ancient Northern Frontier. There she meets Chu Heng, a troubled noble heir, and forges a magical bond across time. She sends modern medicine, warm gear and assorted food through the music box to help Chu Heng save his kin and endure the bitter northern cold. Their families from separate eras look out for one another. Drawn to each other, they grow and find warmth amid their encounters.
