Bai Yutang and Zhao Zhen went to the imperial kitchen to steal food in the middle of the night. They wanted to punish Concubine Pang, but they accidentally discovered the fraud in the examination room. Zhan Zhao's cousin suddenly came to visit and asked Zhan Zhao to help him clear his joints to help him take the exam, but Zhan Zhao actually agreed. Bai Yutang and Zhao Zhen left the palace incognito, and even wandered onto the flower boat. They also discovered a big secret and were in danger. Zhan Zhao arrived later. How did the three of them escape smoothly?