 A nine-year-old boy, Qingyu s mother Meifeng is arrested for the murder of her husband (Qingyu s stepfather). The pathologist, Chongzhe, who is involved in the case gradually befriends the young boy who is the sole witness in the murder case. He realizes that Qingyu yearns for his paternal father who has mysteriously left them years ago. As Qingyu gets to know Chongzhe better, he starts to explain what he had seen on the night of the accident, causing insufficient evidence to convict Meifeng, and she is released on bail. Later, the body of Qingyu s paternal father is found. Meifeng is immediately arrested again...