Storms and storms were coming, and the roar of the waves was terrifying. Under such extreme weather, it was extremely difficult for the fleet to move forward. Some criminals even secretly damaged the mast and rudder, causing casualties. As the fleet was separated, everyone was left alone and helpless. Fortunately, there was still enough food on the ship, and they were still looking forward to rescue. Di Renjie delivered the news to Hong Liang through a carrier pigeon. If something unexpected happened, he asked Hong Liang to submit the letter to the court as evidence to ensure that the truth would be preserved in the world.
Yu Su was bullied by the officers and soldiers, and Qiao Tai came to the rescue in time. Ma Rong was deeply moved by this hero saving the beauty. While Di Renjie and Hou Yu were talking, they suddenly thought that Wang Lide was good at observing the stars and would check the nautical charts wherever he went. Therefore, they suspected that the nautical charts they obtained might not be authentic because there were no marks on them.
While he was talking, Ambassador Liu summoned everyone on board to the cabin to check for the traitor. Jin Sang revealed that Wang Li De had a close relationship with a singer from Baekje, suggesting that Yu Su may have clues related to gold. Liu Zhongshi tortured and interrogated Yu Su. The scene was so cruel that Cao An couldn't bear to look at it. Di Renjie persuaded Yusu to reveal the whereabouts of Wang Lide and Huang Jin, but Yusu only said that Wang Lide had promised to come back to redeem himself, and knew nothing else.
Unable to get any useful clues from Yu Su, she was taken away by officers and soldiers. Di Renjie stabilized Cao An's emotions and told her to stay calm with his eyes. Later, Di Renjie revealed in public that Mr. Yi had personally led a large ship to sea in the dark, which happened to be the same day as Wang Lide's accident. This was too coincidental and made Mr. Yi's sophistry seem weak.
Soon, heavy fog began to appear on the sea surface, and Hou Yu informed everyone to return to the cabin to rest in case of an accident. Di Renjie and Hou Yu jointly analyzed the case and believed that it was most likely that the Baekje people used gold to smuggle arms from the Tang Dynasty. After the fog cleared, everyone found that sexton Yi was dead and his body was hung on the mast.
This incident caused Gu Mengbin to feel extremely panicked and ordered his followers to guard him at all times. It is precisely because the inner ghost is still lurking on the ship that it makes people panic. Liu Zhongshi suspected that everyone might have ulterior motives, and even threatened Di Renjie that he would personally interrogate Cao An if the murderer could not be found.
Qiao Tai was worried about Yu Su's safety, so he quietly sneaked into the bilge to check on her condition, and personally fed her water and applied medicine, while Ma Rong kept a careful lookout outside. After nightfall, Gu Mengbin used a starboard to observe the stars. This move inspired Di Renjie. He believed that the ship was traveling along the ocean current, which coincided with Wang Lide's route.
In order to prevent Yu Su from revealing Baekje's secrets, Bai Kai decided to kill her personally, but was discovered and stopped by Qiao Tai and Ma Rong in time. Bai Kai's assassination attempt failed and he was forced to the deck by everyone. He simply admitted that he was the flag captain of Baekje's Tiger Army. Although Di Renjie speculated that Wang Lide had the support of high-ranking officials in the court, Bai Kai remained tight-lipped about this.
During the day and night, many changes occurred on the ship. Yi Pan was suspected of being murdered, and Bai Kai jumped into the sea and died after being arrested. According to the measurement of the star board, they have been drifting along Wang Lide's channel, and the clues to the gold case have gradually become clear. With the pleading of Di Renjie and others, Yu Su was able to return to the cabin to rest, with Cao An taking good care of her.
Di Renjie found Cao An and asked her why she insisted on boarding the ship, and asked Yu Su about Bai Kai's other situation. Cao An remained silent, and Yu Su also said she knew nothing about it. After Di Renjie left, Yu Su took the initiative to tell her story with Wang Lide, and realized that the relationship between Cao An and Di Renjie was unusual.
During the investigation of this gold case, Di Renjie deeply felt that Hou Yu had an extraordinary understanding of tides and astrology. Hou Yu smiled and explained that he learned this knowledge from his grandfather, but rarely mentioned his grandfather's affairs to the outside world. At the same time, Gu Mengbin sent gold to honor Lieutenant Liu, and falsely claimed in front of him that Di Renjie intended to protect Wang Lide. He was afraid that the two would conspire to secretly control the smuggling of gold. After hearing this, Ambassador Liu was thoughtful and said that if Di Renjie was really like this, he would have committed a serious crime that would implicate the nine clans.