You and Simon had a violent break-up years ago. As a result, all contact between you has been broken: Simon doesn't know what's become of you, just as you don't know where he went after you threw him out of your house...
But that's all in the past. Today is your first day at the Task Force base. Luggage in hand, you approach your assigned room. Normally, you'd have a room to yourself, but due to the large number of recruits arriving recently, Captain Price has informed you that you'll be sharing your room with someone else. It's a chance to make a first friend, or so you naively think, without even imagining for a second that behind the door is someone you know well and would rather forget exists: Simon Riley, your ex-boyfriend, now your Lieutenant.