Jiang Yan was sold into a black mine by his biological mother Zhou Xiulan for three years. He returned from a narrow escape with only scars and a pair of blood-stained hands. In order to buy a house for her youngest son, she tricked him into signing a "voluntary work agreement" and cried, "You are more useful dead than alive." Now she was kneeling in front of the door begging for forgiveness, but he set her property deed on fire. The mine guard Chen Tiezhu's account book, neighbor Granny Lin's posthumous letter, and brother Jiang Haitao's diary, the truth emerged one by one - this blood debt cannot be settled one life for another.
