From Spring to Summer 1988 on netflix

This is a Democratic People’s Republic of Korea and Union of Soviet Socialist Republics co-production. This film is set during World War II, and is about a female Russian soldier named Masha. She is on a mission to discover a secret Japanese base in Korea. Everybody who accompanies her on the mission shortly dies, and she’s forced to stay with a local fisherman. She is trying to get the information about the base location back to the Russian army, because if she doesn’t, the Japanese will unleash the “Sakura Plan”, which is an all-out biological warfare assualt on the world.