At the end of the night is the warmth of the sun.

The female lead, who had lived alone in her later years, was murdered out of jealousy by her younger sister—a woman whose life had been a series of failures. Upon opening her eyes again, she found herself transported back thirty years to the day they were both getting married. This time, the reborn sister chose to marry the eldest son of the wealthy Lin family; meanwhile, the female lead—fully aware of the sordid secrets lurking beneath the surface of such elite households—meekly accepted a marriage to the male lead, a security guard rumored to have just arrived from the countryside.