After finding the royal secretary's journal suspicious, Hwan starts investigating what happened in Byeokcheon and the dried peony petals. After getting a mysterious letter, Cho Won Bo tries to subjugate the remnants of the thieves. 

Jae Yi claims that her memories are true, but Hwan trusts Tae Gang which confuses Jae Yi even more. Meanwhile, to teach 'Woodpecker' a lesson, Ga Ram steps up. Upon learning that the man who tampered with the written prayer is in Paju, Hwan leaves with Jae Yi and Seong On, but they find themselves in danger.