The 35-year-old second-married heroine Lin Wan decided to divorce because of her low self-esteem because she was 8 years older than her husband. She discovered that her husband was close to a younger woman and she had brain cancer. Little did she know that the other party silently mortgaged the property and hid charity projects in her name. When the misunderstanding was solved layer by layer with the red string bracelet and the photo taken at the mountainous primary school, she was shocked to realize that he had already made "side by side with her" the background of his life. From the "self-sacrificial farewell" to the "life and death agreement of two-way donation", two people who were once owed by fate wrote a love that transcends blood and life and death in the cracks of time - it turns out that the best redemption is to let each other become the light of others.