Se Poong and Eun Woo make up for each other's shortcomings as they continue with their journey of treating and helping people in need. Sin Woo watches them from afar, and their intimacy is just too unbearable for him to handle. Meanwhile, the truth behind the night of the deceased King's death remains in the dark. 

As the plague spreads throughout Sorak Village, those who are infected are on the verge of being burned alive just for the purpose of stopping the contagion. While treating the neglected patients, even Eun Woo gets infected, and Se Poong chooses to risk everything to save her. Meanwhile, Ji Han seems to be the only one who knows enough about the plague, but he just won't say a word about it.