Gu Zheng discovered that after his wife Song Yining scratched off a prank lottery ticket given by a colleague, she mistakenly believed she had won eighty million. That night, she contacted her ex-boyfriend Zhao Xin, promising to pay off his debts for him and divorce to marry him. The next day, Song Yining brought her entire family to force Gu Zheng to sign an agreement where he only wanted the house and car and gave up everything else, and everyone secretly mocked him for not knowing how to calculate accounts. Gu Zheng had already confirmed through chat records and shopping pages that the lottery ticket was fake, but calmly preserved the evidence, quietly waiting for them to push open the door leading to the truth with their own hands.