Agent Zoe is betrayed by her fiancé and stepsister during a zombie apocalypse, but is unexpectedly saved by the zombie king Ethan on the brink of death. To complete a secret mission, she approaches Ethan to uncover the truth behind the virus, only to discover their fated connection. From using each other to falling deeply in love, they join forces to seek revenge, expose the conspiracy, and end the apocalypse.