Rachel’s nightmare as a parent is only the start of her harrowing journey. Following a devastating accident, she and her husband Anthony relocate across the globe to concentrate on their surviving twin, Elliot. Initially, their time in the secluded Finnish countryside is meant for healing, but it soon spirals into a frantic struggle for Elliot’s soul. An entity, asserting to be his deceased twin brother, begins to possess him, propelling Rachel into a sinister quest to uncover the terrifying reality about her son.