The Undying is a 2011 American supernatural romantic thriller directed by Steven Peros, written by David M. Flynn and Steven Peros, and starring Robin Weigert, Anthony Carrigan, Wes Studi, Jay O. Sanders, and Sybil Temtchine.
Dr. Barbara Haughton (Robin Weigert) discovers the farmhouse she's recently rented is inhabited by the ghost of Elijah Parmenter, a Civil War soldier.
As her interest in Elijah grows and his presence comes to dominate her dreams, she assists in emergency surgery to save Jason Donovan (Anthony Carrigan), a young stabbing victim.
As Barbara removes Donovan from the machines that are keeping him alive, she suddenly realizes that his body, no longer wanted or needed, might serve another purpose.
She reconnects the body to a mobile life support gurney, brings it to the farmhouse and offers it to the ghost.