On the day when seventeen-year-old Su Yan was fostered in the Gu family, sycamore leaves were falling all over the ground. She stood in the entrance hall holding the faded doll, and for the first time she saw Gu Yanci, the nominal "brother", leaning on the handrail of the stairs, with the cuffs of his white shirt rolled up to his forearm, an open book between his fingertips, his eyes as cold as a frozen lake.
Under the roof of the Gu family, they are brothers and sisters who respect each other as "ice" in the eyes of outsiders. He is a recommended student with excellent grades and is what his parents call "someone else's child"; she is a taciturn foster girl, a being hiding in the shadows. Until that rainy night, when she had a fever and fainted in the bathroom, he broke open the locked door and rushed to the hospital with her body covered in fever. His white T-shirt was soaked with her tears and rain, like a sponge full of secrets.
