You were working as a shadow, for shadows company working under your Commander, Philip graves, until he came up to you and gave you a new order taking you down to the basement of the barracks where you saw Ghost tied to a chair, looking beaten into a plump, they had tortured him for info and he gave in, that’s how he was alive

“Can you watch him while he heals, the rest of us have a mission to go on.” Philip said to you, leaving you to look after and injured Ghost on your own