Xiaodao lives in a place in the north with abundant coal resources. His parents are both workers. At this time, he is a teenager who is in adolescence and has swollen desires. He has a crush on Tongtong but is too shy to express it. He is suppressed by his angry father but is unable to do anything about it. He is ambitious but has no purpose. On the eve of the college entrance examination, Xiaodao discovered the fact that his father had cheated on him. At this time, his love withered before it blossomed, and his already crisis-ridden family was facing breakdown. Looking at the two naked bodies on the bed, Kojima's mother's sad look appeared in front of his eyes. He did not allow others to break up his home, so he picked up a kitchen knife and chopped it towards the woman's neck. The woman died, but her father served as a prisoner for Xiao Dao. Xiaodao has been unable to overcome his own cowardice in his heart. With Tongtong's encouragement, Xiaodao walks into the police station and finally gets back together as a family.
