Following the devastating loss of her husband, who was stationed in Afghanistan, Bryony attempts to create a new life for herself and her young son, James. While grappling with her own sorrow, she overlooks the fact that James has become secretive and withdrawn, spending long hours alone reenacting death scenes with his toys. When items begin to disappear and furniture is destroyed, Bryony initially blames James. However, upon confronting him, she is faced with a reality more horrifying than any nightmare. As her world falls apart, Bryony realizes that unless she finds a way to reconnect with her son, they risk being separated forever.