After suffering his untimely death in the Living World, 16-year-old Eli is reincarnated as a Sentinel: an apparition tasked with ensuring the safety of the Living. However, Eli’s new role is immediately fraught with turmoil, as an impending crisis threatens to wipe out humanity. With his team of fellow Sentinels, Eli must give his all to prevent Armageddon, but malicious souls from the Underworld aim to thwart their efforts. Meanwhile, disturbing events from Eli’s past continue to haunt him, and he soon must answer important questions: Who is he, and does he really have what it takes to be a Sentinel?

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