south korea   heroine   father daughter relationship   1930s   impersonation   contract killer   hill   female sniper   honor   sniper   stabbed through the chest   ambush   traitor   spy   u.s. air force   child murder   battle   border   north korea   korea   double identity   uxoricide   korean war   resistance   nationalism   imperial japan   chinese army   female hero   knife in the chest   cease fire   year 1953   japanese occupation   falling soldier   fierce fighting   gift exchange   morphine addict   strategic mountain   switching sides   war orphan   friendship   betrayal   murder investigation   murder   revenge   hitman   infiltration   japanese soldier   identical twin   japanese occupation of korea   murdering the wrong person