"Nails" is the story of Dana Milgrom (Shauna Macdonald), a track coach who's survived a near-death car accident, only to find herself almost completely paralyzed and trapped inside her own body, forced to communicate via an artificial voice program. While recovering she becomes convinced that some evil presence exists inside her hospital room and is intent on killing her. No one believes her - not even her own husband and daughter, who think she's experienced a mental breakdown.