General Choi Young plans to go on a conquest of the Liaodong peninsula despite of many ministers' objection. General Lee Sung Gye tells him that they should not put the people into a state of distress. Meanwhile, Jung Do Jeon decides to stage a coup, ordering the members of his organization in the court and in General Lee's private armies in Hamju to move. He suggests to Lee Sung Gye how to avoid the calamity of war.

King Woo calls the escaped Lee Sung Gye's family as rebels, and orders Choi Young to recruit soldiers. Bang Won and Boon Yi give directions to the members of their organization to fight against it. Lee Sung Gye's armies break through Sunginmun gate and occupy the palace. Meanwhile, when a song implying "Lee Sung Gye will become a king" spreads in the marketplace, Bang Won and Boon Yi chase the person who spread the song.