In the suburbs of a city, a middle-aged woman lives with her son. Her son, who has excellent academic performance, has been admitted to a key university in the city. This is the middle-aged woman's greatest pride. She imagined that after her son graduated from college, she would enjoy a wonderful retirement life and travel around. After sending her son to school, she realized that her son had never left her in 18 years, and she started to miss him after only a few days. However, she did not expect that the day she sent him to school would be the last time she saw her son, and his son disappeared inexplicably...
Purpose: In the process of constantly searching for his son, he discovers the truth.