S1·E36 Dong Yi's Trap

Dong Yi decides to go back to her residence, but Jang Ok Jeong does not let her. She knows that when all the guards and police are in one place, Jang Ok Jeong accomplices can search for the records freely. They do find the records in Dong Yi's room. However, Dong Yi wants them to find the records so that the police can catch Jang Ok Jeong's brother when he is in the act of handing it over to the Qing delegates. So, when Jang Hee Jae realises that he is surrounded, he tries to burn the records but get caught in the act. He and his accomplices get caught and tortured. Jang Ok Jeong proclaims that she is innocent and supported by the Southern Faction.