A young couple moves to their new home in Kep, when Thida, the wife, starts to notice strange and terrifying sights. She finds an old letter that reveals the secretive past of her husband, Nak, just as he's paralyzed and a dark spirit threatens to take him into another world. Thida struggles to protect Nak from the fierce demon that is after him. She finds strength in her immense love for her husband, but is that enough to save him from the relentless angry force that threatens them both.