Princess Ha Yeon and Prince Myeong Ahn leaves the palace to meet Monk Mu Jin and an assassin follows them. Hwan and Jae Yi ask Tae Gang about the new mystery they unfolded, but Tae Gang says he doesn't know anything about it. Meanwhile, the Queen tells Seong On the truth about Jae Yi and Jae Yi finds herself in danger.

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After finding out what's written in the Jikgeumdo, Hwan and Han Jung Eon are in shock and Jae Yi gets arrested for murder. Hwan is even more shocked to hear Jae Yi admit everything. Jo Won Bo demands that the Crown Prince gets deposed. Meanwhile, Seong On gets an order from the Queen in secret.