Shi Wan, also known as Shi Yiguang and called Xi Shi by the world, is a beautiful and frail woman with a congenital heart condition that persists even after death. Her soul arrives in a void space after dying, and she is barely kept from dissipating by the system Tuan Tuan, which promises her rebirth if she accumulates merit by traversing three thousand small worlds. The way to earn merit is to win sincere true hearts—gratitude, family affection, love—especially from those with deep blessings. She is gentle, self‑mocking, and kind‑hearted. Without a second thought, she agrees to fulfill dying wishes. She later takes the identity of Sifu, the primary consort of Prince Yong, using that body to carry out the original owner’s wish. Despite her own pain, she shows tenderness and patience toward others.