Olivia "Liv" Moore (Rose McIver) was a rosy-cheeked, disciplined, over-achieving medical resident who had her life path completely mapped out…until the night she attended a party that unexpectedly turned into a zombie feeding frenzy. As one of the newly undead, Liv uses her new powers to solve murder cases. In season three, Liv discovered that there are more zombies living in Seattle than she previously believed, including a private military contractor employing a zombie army preparing for the day humans learn of their existence. In season four, Seattle has walled-in its zombies to protect the rest of America, and the 10,000 zombies living in the city struggle to find enough brains for food. As Liv and Clive continue to solve homicide cases each week, nearly every detective at the Seattle PD now works with a Zombie.