In the summer of 1996, a heavy rain soaked the young Jia Yu, opening up the world of the little girl Dongdong.
Six-year-old Dongdong was picked up by her brother and brought back to a dilapidated home. From then on, her life was re-engaged by the gears of fate. He is the salvation of her destiny and her only support.
Jia Yu, a taciturn but gentle boy, protects Dongdong with all his strength. From the panic on rainy nights to the laughter in the fields, from the clinic in the small town to the acceptance letter from No. 1 Middle School in the city, he held up the sky for her. However, fate never let them go.
When the director of Luoshan Orphanage passes away unexpectedly, and when his brother's past gradually comes to light, Dongdong's world falls into darkness again. How should she face her brother's secret?
Purpose: Be a good person