Chu Mingzhao, the lost princess of Southern Chu, took the initiative to marry Bei Yan in order to save the orphan of the clan, and became the old emperor's concubine, which was actually a hostage. She used her "straight ball" as a blade to fight her way through the hypocritical palace, revealing the truth that her beloved concubine was actually a spy for the enemy country. Instead, she was framed by her vicious stepfather and a cheating scumbag, and was thrown into a sky jail. In a desperate situation, only Gu Jiuxiao, the enemy's hostage, protects him with his life. From testing each other to fighting side by side, the two tear apart the most hypocritical mask of the palace in repeated Shura fields and desperate adversities, and finally ignite the flames of revenge, make all betrayers pay the price, and join hands to create a prosperous era of the New Deal.