Loosideu Deurim
루시드 드림 (original)
After searching for his abducted son for three years, a devastated father attempts to track down his missing child through lucid dreams.
Starring Go Soo, Sol Kyung-gu, Park Yoo-chun, Kang Hye-jung, Park In-hwan, Cheon Ho-jin, Jun Suk-ho, Kim Kang-hoon, Nico Birnbaum, Lee Si-a
Watch "Loosideu Deurim" on Netflix released in 2017. It's a science-fiction and thriller movie, and has a rating of 6.1 out of 10 from Imdb which is usually fine for this kind of movie.