Ice City's Hidden Blade

This is my first time writing, so I have no experience. I chose a spy drama I like and am writing a fanfic as a way to soothe the lingering disappointment I felt while watching it. The heroine is a special forces soldier reborn from the future. She has a golden finger and knows that courage alone cannot save the country, so, knowing how the story unfolds, she sets out to find comrades she can trust.