Episode 10 recap: Yu Su was forced to confess.

The ship encountered a storm, with not only the mast breaking but also someone falling into the sea. This was not a normal situation, and Gu Mengbin realized that there was a traitor among the team. He was furious. Di Renjie detailed the current situation, intending to present it to the Empress in case something happened to himself.

Hou Zhongtang maintained a calm demeanor to stabilize the morale of the troops. Besides, there were sufficient supplies on the ship, so even if they were stranded for a few days, there would be no shortage of food. The supply ship would come to their aid soon, so there was no need to worry. Di Renjie had brought carrier pigeons with him when he set out to sea, just in case. He never expected to actually use them. He hoped the pigeons would carry the news of their predicament and bring support.

Yu Su went to fetch water for Cao An. The Feather Forest Army tried to take advantage of Yu Su due to their status. Fortunately, Qiao Tai noticed and quickly intervened to help Yu Su, and when the Feather Forest Army heard Ma Rong shout that Hou Zhongtang was coming, they hurriedly left. Ma Rong saw Qiao Tai's considerate behavior and realized that he liked Yu Su, which made him secretly laugh.

Liu Zhongshi suddenly interrogated Jin Sang and revealed that he remembered his skill in fishing from his childhood. If a big fish took the bait, he would use a fork to strike at the right time. Liu Zhongshi used his words to prompt Jin Sang to speak up. Today, he must say something. Jin Sang then recounted his experience from the previous night. He suddenly remembered that Wang Lide mentioned having a geisha lover on the shore. Liu Zhongshi asked Jin Sang to identify her, but Jin Sang had never seen her in person and couldn't recognize her. However, he knew that the geisha was a Baekje person.

Upon hearing this, Yu Su fainted on the spot. Liu Zhongshi ignored this and ordered people to extract a confession through torture. The cries of pain from Yu Su made everyone uncomfortable, and eventually, she passed out from the torture. Cao An couldn't bear it and wanted to step forward to save her, but Di Renjie subtly indicated for her not to act rashly. He whispered to Yu Su, coaxing her to reveal the truth. Yu Su admitted that Wang Lide had mentioned that they would be at sea for one or two months and that he would bring a large sum of money to ransom her.

Upon hearing this, Liu Zhongshi suspected that no one on the ship was telling the truth. He pressured Di Renjie to quickly find clues. Di Renjie disclosed that Yisi Shi had sailed out to sea late at night on the day the ship had the accident. Liu Zhongshi immediately began questioning him. Coincidentally, the ship suddenly encountered dense fog at that moment. For safety, everyone had retreated to their cabins. Yisi Shi took advantage of the fog and slipped away quietly. After the fog cleared, he was found hanging dead from the mast.

Di Renjie found the whole situation suspicious. He pointed out the doubts surrounding Yisi Shi's actions, and Yisi Shi ended up dead. Gu Mengbin was frightened by Yisi Shi's death and didn't dare to stay in his own room. He moved to a room under his subordinates' protection, seeking a sense of security. Di Renjie saw Gu Mengbin using a starboard to determine the course, and through comparison, he discovered that Wang Lide's starboard was flawed. Fortunately, despite the absence of a mast, they were able to navigate along the correct route following the ocean currents.

Qiao Tai felt sorry for Yu Su, firmly believing that such a kind-hearted girl couldn't be a villain. He secretly went to see Yu Su and gave her medicated water without anyone else knowing. Ma Rong warned Qiao Tai not to cause trouble for Di Renjie. At that moment, they discovered that Bai Kai had secretly gone to the place where Yu Su was being held. It turned out that Bai Kai was also from Baekje, and he believed that Yu Su knew too much and would eventually confess under torture. He wanted to kill Yu Su first. Qiao Tai appeared just in time to save Yu Su and exposed Bai Kai's identity. Bai Kai was forced to the edge of the ship, claiming that Yu Su knew nothing and begging everyone to spare her. At the same time, he refused to believe Di Renjie's claim that Baekje was about to fall and refused to disclose the high-ranking officials in the court who could provide military supplies. He turned and jumped into the sea.

Yu Su couldn't help but feel sorrowful and cried out, hoping to call Bai Kai back, but it was already impossible. Di Renjie interceded for Yu Su and allowed her to return to her cabin to rest. When Cao An heard that Yu Su was also frightened in her dreams, she couldn't help but feel distressed. Di Renjie had advised Cao An not to come aboard, but she still did, and now they were facing so many problems, which perplexed Di Renjie.

Yu Su mentioned Wang Lide to Cao An, saying that although he was ugly, he treated her well and had a hidden kindness. Before leaving, he specially found a new song from the capital to play for her. When they were together, she felt like a guest, and Wang Lide was like a geisha. Gu Mengbin secretly bribed Liu Zhongshi without informing Di Renjie and Hou Zhongtang. He recounted recent events, trying to paint Di Renjie as suspicious and lead everyone to the ship to kill Yisi Shi, the person who knew too much. He also forced Qiao Tai, who had secretly visited Yu Su several times, to drive Bai Kai to jump into the sea.