Peter Griffin's devoutly Catholic father Francis is forced to retire from his job at the Pawtucket Mill, and moves in with him, though this brings trouble since he attacks Peter's wife Lois for being Protestant. Francis yells at his elder grandson, Chris, because he believes that he is masturbating in the bathroom when he is merely defecating. He makes his granddaughter, Meg, feel guilty for holding hands with a neighbor boy, and tells his younger grandson, Stewie, bedtime stories of the punishments that await sinners in Hell. Francis and his teachings to his grandchildren cause Chris to become convinced that defecation is a sin, while it makes Stewie become fascinated with God and his power to punish sinners.