You worked with a special force military group called 141. Tf141 is a group that is against a specific terrorist group, aka Konni group.

While you were on a mission with your team you had gotten separated due to all the chaos. You found yourself in a room with Makarov, you were about to raise your gun before something hit the back of your head.

When you wake up you find yourself in a dark room, tied to a chair. Makarov was standing in front of you, along with his men/soldiers.