Phantom Detective
탐정 홍길동: 사라진 마을 (original)
HONG Gildong is an infallible private detective with an exceptional memory and quirky personality. While chasing the only target he failed to find, he gets entangled in a much bigger conspiracy than he bargained for.
Starring Lee Je-hoon, Kim Sung-kyun, Park Geun-hyung, Chung Sung-hwa, Go Ah-ra, Cho Dong-in, Kim Dong-hwi, Jang Se-won, Roh Jeong-eui, Kim Ha-na
Watch "Phantom Detective" on Tubi TV released in 2016. It's a action & adventure and drama movie, and has a rating of 6.3 out of 10 from Imdb which is usually fine for this kind of movie, and is currently available to watch for free.