On an island off the coast of North America, two feuding families, the O'Flynns and the Muldoons, have starkly different views on how to deal with the zombie outbreak that has swept the globe. The O'Flynns, led by patriarch Patrick, believe that the undead should be destroyed on sight, seeing no hope for their humanity. In contrast, the Muldoons, under the leadership of Shamus, are convinced that the zombies can be cured one day and opt to keep their zombified loved ones alive in chains, waiting for a possible cure. Amid this backdrop, a small group of soldiers who have gone AWOL in search of a safe haven stumble upon the island. Seeing it as a potential refuge from the chaos of the mainland, they quickly find themselves entangled in the local conflict.

As tensions rise between the rival families, the soldiers' presence on the island exacerbates the already volatile situation. The ideological battle over the fate of the zombies mirrors the broader struggle for survival in a post-apocalyptic world. With both sides unwilling to compromise, the island becomes a microcosm for humanity's struggle to maintain its humanity in the face of an existential threat. The soldiers must navigate the treacherous landscape of human emotion and moral dilemmas, finding themselves caught between their own survival instincts and the desperate measures of the island's inhabitants.