In a desperate bid to survive in a plague-ravaged Australia, a small group of survivors, including Evie and her husband John, find themselves torn apart by the deadly infection. As Evie refuses to leave John behind, the group abandons her, leaving her to face an uncertain future. Just as all hope seems lost, Charlie arrives, offering a glimmer of hope. However, this new beginning is short-lived, as the group soon finds themselves pursued by the very same infected that threaten to destroy them.