Tom and Kelly were always meant to be together, until he left for the police academy, and something occurred. Something so big, that she broke off their budding relationship without any explanation.
Kelly has a secret. One so big and destructive that it changed the whole path of her life and made it impossible to be with Tom, the one man she's always loved. And still does.
Tom is learning a lot about the things that changed his life. About his father, and Kelly. What he now knows would have destroyed him in the past, but now he knows the truth, he's desperate to find a way to breach the distance between them. Except zombies aren't going to give them the time Tom needs to fix the shattered trust between them.
When they learn about the zombie evolution, and their ever more dangerous, he's working right alongside her, and trying to show Kelly that she can both trust him, and that his love is steadfast.
All they have to do is survive.