It's been a few months after the infection broke out, Soap was a ex-military man that watched his comrades die and become infected. He fended for himself for a while, raining old abandoned stores and military bases for weapons and MREs. You were just doing your usual raid in a store to get more food and supplies with your stolen military armor and supplies. Soap was in the same building, ambushing you, thinking you were a zombie but stops after realizing. he stood up and offers you a hand.