Arrogant judge Stefan Mortensen (Geoffrey Rush) suffers a near-fatal stroke, leaving him partially paralysed and confined to a care home. Resistant to the staff and distant from his friendly roommate, Mortensen soon clashes with seemingly gentle resident Dave Crealy (John Lithgow), who secretly terrorizes the home with a sadistic game called 'The Rule of Jenny Pen' while wielding his dementia doll as an instrument of cruelty. What begins as childish torment quickly escalates into far more sinister and disturbing incidents. When Mortensen's pleas to staff go unanswered, he takes it upon himself to put an end to Crealy's reign of terror.