Yun Shu is a young woman with a congenital heart condition who has lived her entire life as the adopted daughter of the wealthy Yun family. For twenty-three years, she enjoys a privileged existence in Beijing, cared for by her adoptive parents and brother, despite her frail health. The narrative begins with a devastating revelation: the Yun family’s biological daughter, Yun Shanshan, has been found living in the countryside. Driven by guilt and anger over the swap orchestrated by Yun Shu’s biological parents, the adoptive mother forces Yun Shu to leave the family home. Heartbroken and desperate, Yun Shu pleads to stay, but is firmly rejected. As she departs in a car driven by her loyal family driver, Zhang Shu, she suffers a severe cardiac episode. The driver rushes her to the hospital, where she is stabilized but faces financial difficulties due to her lack of funds. Her adoptive father eventually pays the medical bills, signaling a lingering, albeit complicated, familial bond.
Yun Shu’s story takes a supernatural turn when she realizes she has been reborn two days prior to her previous death. In her past life, after being evicted, she returned to the Yun villa to retrieve a jade pendant given to her by a Taoist priest, which had significantly improved her health. Upon retrieving it, she was pushed down the stairs by Yun Shanshan, who coveted the pendant. Yun Shu died in a pool of blood, watching as the pendant absorbed her life force before she was pulled into a vortex and reborn. Now awake in the hospital bed, Yun Shu resolves to change her fate. She sends Zhang Shu to retrieve the pendant, which she believes is crucial for her survival. When she holds the pendant, it cracks open, releasing a beam of white light that awakens a "Super Invincible Medical System" within her mind.
The system reveals that it was damaged during transit from an interstellar realm and stored within the pendant. Yun Shu’s blood in her previous life revived it, and in exchange for binding to her, it used its remaining energy to resurrect her two days ago. The system can cure her congenital heart disease using an interstellar restorative elixir, but this requires collecting human "favor points." Each drop of the elixir costs five hundred points. Yun Shu’s journey shifts from mere survival to actively gathering affection from others to fund her cure. The system also manifests physically as a tiny white kitten named Meow Meow, providing companionship.
After being discharged, Yun Shu moves into a small apartment in Yunhai City, a city her adoptive father had purchased for her. Her new life is lonely and difficult due to her weak constitution. During a hospital visit for a stomach ailment, she is treated by Shi Muchuan, the chief physician of cardiology. Shi Muchuan is initially distant and professional, having dealt with many patients seeking his attention for reasons other than medical need. However, Yun Shu’s genuine, fragile nature and polite demeanor begin to soften his attitude. She accumulates favor points through small acts of kindness, such as sharing snacks with nurses and comforting an elderly cancer patient.
A pivotal moment occurs when Yun Shu witnesses a woman attempting suicide by jumping from the hospital rooftop. Ignoring her own health risks, Yun Shu climbs to the roof and successfully persuades the woman, Lin Man, to come down by impersonating her deceased younger sister. This act of bravery earns her a significant number of favor points, allowing her to purchase her first drop of the restorative elixir. After drinking it, Yun Shu experiences a detoxification process that slightly improves her condition. She then helps Lin Man by contacting a family friend, Uncle Yang, who agrees to help Lin Man reconnect with her relatives abroad and escape her abusive stepmother. Through these events, Yun Shu establishes a new purpose: to live fully, help others, and accumulate enough points to cure her heart disease, all while navigating her complicated relationship with the reserved but increasingly attentive Dr. Shi Muchuan.
