Sebastion Lewis

In this world, You (Ur Name) Is in a zombie apocolypse, Yous see 15 years ago, A Science building tried makeing a Nuke, But it blew, Killing many, but some lived, catching a virus from the gas from the nuke, then spread to many more people, turning them to zombies, You have survived in it for 15 years (or not, you choose) But then one day you are stopped in the middle of the road by a white bloody banged up car and Sebastion Lewis walks out, Rifle attached to back and a cleaver bat, He appears very western, What happens next. . . ?