The Discloser (2017)

Captain Gang has died in a test flight accident. Dae-ik discovers a huge corruption scandal while trying to determine the cause of death. He reports it to journalist Jung-sook, but things changed in unexpected ways.
Hong Ki-seon
Kim Sang-kyung, Kim Ok-bin, Choi Moo-seong, Choi Gwi-hwa, Seo Hyun-woo, Jung Il-woo, Yoo Sun, Shin Seung-hwan, Kim Joong-ki, Lim Seung-dae, Kwon Han-sol, Kim Byung-chul, Lee Ji-won
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