Flood and Lonely Boat

On the day he obtained his Beijing household registration, Lin Yuanzhou received a call from his mother who was diagnosed with Alzheimer's disease. She spent her entire life escaping from that home - her alcoholic father, her harsh mother, and the frozen Heilongjiang. Now, she is forced to become the keeper of her mother's memory. When the account book full of birds and black circles was reopened, she was shocked to realize that her mother Zhao Xiuqin's silent life was a magnificent epic that she had never understood. It turns out that the shackles she struggled to break free from were the path paved for her with her mother's backbone; the counterattack she was proud of was based on her mother's huge sacrifice. Facing her mother who is gradually forgetting everything, can she say a belated "I understand" at the end of time?