Sangla Heeyo, Princess of Heaven and the Netherworld, is a powerful immortal trapped in a frail form. One day, she meets the spirit of Princess Ruhwa and learns of her tragic past. In exchange for granting Ruhwa a new life among the immortals, Heeyo assumes her body and takes her place in the human realm. With her health restored and divine power intact, Heeyo embraces the ordinary joys she once dreamed of while uncovering the truth behind Ruhwa’s death and delivering divine punishment.