100 Days My Prince (2018)
Original Title: 백일의 낭군님
S1 E14-We Must Solve the Riddle
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.
100 Days My Prince - watch online: stream, buy or rent
Currently you are able to watch "100 Days My Prince" streaming on Netflix.