Yu Zhi's sister Yu Miao is a child with a cheerful and generous temperament. As the eldest son of the family, she is always overly sensible and kind to help the family; her younger sister Yu Zhi is naughty and free to let herself go. However, life on a small, isolated island is never as carefree as it seems.
18 Years old is an age that makes people full of expectations and yearning. However, Yu Miao's 18-year-old was replaced by red, crying, separation, and death.
Yu Miao disappeared, her grandfather died, her father was paralyzed due to poisoning, and the family fell apart. As a mother, Li Jiajia had no choice but to escape with Yu Zhi in order to protect her.
Six years later, his father finally passed away. Li Jiajia took Yu Zhi back to the beginning and end of everything, back to the past, back to the past. Yu Zhi walked through the road and choices of the past again, and her life seemed to have begun to undergo some wonderful changes...
Mission: Deep sisterly love, mutual redemption