After transmigrating to the Three Kingdoms era, Jiang Zhe activates the Slacker System. All he has to do is listen to the weather forecast each day to receive rewards.
Unexpectedly, by a twist of fate, he mistakes Cao Cao for his father-in-law.
"Taking Xiapi? That's easy. Starting today, there'll be three straight days of torrential rain. We can breach the Si River then, and Lu Bu will be like a fish trapped in a pond!"
"Tomorrow, a sudden southeast wind will rise. Cao Cao's ambitions will be dashed in the southeast. Huang Gai will surrender, then use the strong southeast wind to set the fire ships alight. How could Cao Cao possibly win?"
Confronted with Jiang Zhe, who knows the heavens above and the earth below, Cao Cao can only quietly betroth his daughter to him, making his father-in-law status official.
One day, a drunk Cao Cao declares, "Son-in-law, bet you didn't expect this: I'm your father-in-law, Cao Cao!"