Two years after Dean Winchester's death, the huntress Amalthea is haunted by visions of him suffering in Hell. Her desperate quest to save her soulmate throws her back into the supernatural world, facing not only the horrors of the Underworld but also the chilling presence of Samael, the Archangel of Death, who claims ownership over her. As Dean miraculously returns, changed and distant, Amalthea must navigate distrust, hidden truths, and the looming threat of Lucifer's rise, all while battling her tormentor and questioning who she can truly trust in a world where even angels have secrets.