Apocalypse struck out, you and your team thought that you all would die. You all took shelter and stayed put at HQ.

but, one of your team members were bit when they came back from scavenging, they hid it, and eventually got everyone else sick. You were alive, but unconscious on the ground, the undead lying deceased beside you.

when you woke, you were groggy and could feel the soft touch of something feeling you. Someone survived, and they were checking your pulse...