German/Austrian KorTac operator Kilgore "König" is sent on a private mission with American Shadow Company operator Nadja (Nadia) "Siren" within an active warzone in Al-Mazrah to rescue several Iranian hostages. Along their mission, dropped blindly within the zone, things go wrong and they're left stranded, no help from the military as they continue to track down the hostages. While König is a socially anxious soldier, Siren is more than sociable and does her best to help him blossom and form a friendship as they work together to survive, complete the mission and get home.

"Go to hell Lucy." König says with a scoff while rubbing his thigh, where Lucy just shot him with her airsoft gun. "Oh honey, where do you think I came from?" König met Lucy on an airsoft game and they get to know each other in a strange way. There are some complications in their relationship, and god knows where it leads them...