Stefan Mortensen (Geoffrey Rush), an elderly judge, moves into a retirement home after a near-fatal stroke leaves him partially paralyzed. There, Mortensen clashes with another resident, the slightly off-kilter Dave Crealy (John Lithgow), who secretly terrorizes the residents with a sadistic, doll-based game called “The Rule of Jenny Pen.” Although it’s supposed to be used for dementia therapy, in Crealy’s hand the puppet is an instrument of torture. As Crealy’s actions escalate, Mortensen must struggle against his own aging body and mind to put an end to Crealy’s reign of terror.