A history teacher transmigrates into the least favored of the seventh princes.
It doesn't matter. He's studied the History of the Ming Dynasty and knows that Fourth Brother Zhu Qizhen is the true dragon. If he clings to his coattails and keeps his head down until the Coup at the Gate, his future is secure.
He spends the night writing a ten-thousand-character letter of allegiance, then kneels outside Fourth Brother's residence until dawn.
When the doors open, Fourth Brother smiles at him:
"Seventh Brother, you're well-informed. Father put me under house arrest just last night."
The Embroidered Uniform Guard seizes his letter, and Emperor Renzong is furious. He can't explain himself no matter what he says.
Worse still, Renzong is alive, the Crown Prince is alive, and the History of the Ming Dynasty in his head is worthless. To survive, he takes on a dangerous burden and uncovers a shocking secret.
The Seventh Prince played the fool for fifteen years, then bowed to the wrong person the moment he stepped into the world.
The history teacher had memorized a whole book of answers, but the exam paper had completely different questions.