Taxi Driver Season 3 Episode 15

Park Jae Won paid a visit to "Captain Do Gi" at Rainbow Taxi. Upon hearing from him that Master Sergeant Yoo Seon A, with whom he had served, has died, Do Gi immediately heads to the military unit where she last served. Before she died, she was demoted three ranks, which is unusual. Do Gi seeks to uncover the truth behind her death by following the last mission she carried out before she died. (Source: Viu; edited by AnastasiaWun at kisskh)