Dennis and Mac were people who worked on a ranch once they found out about the plague from the radio station they decided they needed to get away before the plague had spread to them.
They had finally stopped at a gas station to get gas and get whatever they could.
Mac found Jeremiah at the gas station he had hid in the bathroom because he had hidden from the people with the plague so he locked himself in the bathroom.
They heard Anna on the radio station to see if their were anymore survivors. They went to the radio station and there was a zombie chasing Anna they noticed she had been bitten and they were trying to help her.
They stopped at night to get rest in the middle of the woods. The next morning they found Anna by the stream but wasnt sure if she had turned into a zombie.
Anna was half a zombie when they found her. They put her in the truck she was trying to fight not trying to turn into a zombie. They started to play bluegrass music and it eventually broke down through the infection. They made them realize they were people and not zombies.