Simply because her niece is short three hundred yuan for college tuition, Gu Xiaoman, a female township factory director who refuses to lend money, accidentally tears open a shocking scam her father buried for twelve years. In a northern mountain village after the resumption of the college entrance examination, her older brother falsely claimed to go south to do business, but actually dug out his younger sister's tuition coin by coin in the pitch-black coal mine. Yet this blood-money was intercepted entirely by their father, just to buy a word of illusory promise of remarriage. The yellowed stubs of the post and telecommunications office uncover the truth, the siblings clear up their past grievances, a large platform scale weighs out an honest reputation, breaking through from a small township factory into an export-designated factory. Twelve years of grudges are finally over, the accounts are settled, and the family becomes warm.