Ex-lover turns into a zombie and seeks revenge after a nuclear error

Government Accidentally Triggers a Nuclear Bomb and Turns Everyone Into Zombies. After a nuclear explosion causes the zombie apocalypse, a group of survivors must live in a casino in Nevada while trying to figure out a way to escape.

The Title: Remains (film 2011)

Cast:

Grant Bowler as Tom, a casino dealer with a checkered past
Evalena Marie as Tori, a cocktail waitress at the casino
Miko Hughes as Jensen, a magician's assistant who moved to Reno to live with his boyfriend
Anthony Marks as Victor, a ruthless survivor
Lance Reddick as Ramsey, leader of the army convoy
Tawny Cypress as Cindy, medic and Ramsey's daughter