Honestly, this works. There's so many movies about divorced middle aged korean dudes reasserting their worth by getting involved in some shit that allows them to use their masculinity to save a woman or a child. Breaking Bad attempts to do a deconstruction of those types of stories. Walt doing nothing while Jane dies would hit harder in a Korean version.

Even if the villains are North Koreans it won't be a 'evil commies' thing. They will be explicitly shown as rogues going against the northern government. Usually the biggest flex is that the southerner can be goofy while the northerner has to be serious.