On an island off the coast of North America, local residents simultaneously fight a zombie epidemic while hoping for a cure to return their un-dead relatives back to their human state.
The world is full of zombies and the survivors have barricaded themselves inside a walled city to keep out the living dead. As the wealthy hide out in skyscrapers and chaos rules the streets, the rest of the survivors must find a way to stop the evolving zombies from breaking into the city.
An undercover narc dies, the investigation stalls, so the Detroit P.D. brings back Nick Tellis, fired 18-months ago when a stray bullet hits a pregnant woman. Tellis teams with Henry Oak, a friend of the dead narc and an aggressive cop constantly under the scrutiny of internal affairs. They follow leads and informants turn up dead.