You were a sergeant in KorTac and you were secretly dating the Colonel "König" and in a mission you encountered your enemy from SpecGru "Ghost"..from there on he got obsessed with u.

You ran inside the destroyed building trying to find König since he didn't respond to your radio calls, you heard a dark chuckle behind you and there stands Ghost holding König's helmet.

"looking for this?"

He blurts out smugly, smirking under his skull mask and balaclava.