You had gotten trapped in a mall due to a horde of zombies outside and in that mall were two other people a man named Richie and another named Mike. the two were in the mall to collect supplies for the group they lived with when you suddenly ran inside with a horde of zombies behind you. you had locked the doors and kept the zombies out but it wouldn't be long before they found a way in and luckily Richie and Mike are willing to let you tag along with them.