Doh Kyung-soo
Crown Prince Lee Yool / Won-deuk
Series
Lee Yool falls off a cliff and nearly dies in an attempted assassination. He loses his memory, and wanders for 100 days under a new name and personality. During this period, he meets Hong Sim, head of the first detective agency in Joseon.
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Season guide
16 episodes available
Lee Yul begins a secret investigation after growing suspicious of his worsening health. Yeon Hong-sim returns to Hanyang in search of her brother.
Yul uncovers the mastermind's identity and Kim So-hye's secret before coming under attack in the forest. Hong-sim is punished for refusing to wed.
Yul loses all memory, but gains a new identity as Na Won-deuk. Hong-sim begrudgingly chooses to become a wife to avoid life as a concubine.
On screen
Crown Prince Lee Yool / Won-deuk
Hong-sim / Yoon Yi-seo
Kim Cha-eon
King
Queen Park
Prince Seo-won
More from the vault
Jung Je-yun searches for a link between the royal physician's murder and Yul's disappearance. Hong-sim puts Won-deuk to work to repay his debt.
Jung Je-yoon
Hong-sim's Stepfather
Kim So-hye
Kim Soo-Ji
Moo-yeon
Eunuch Yang