Long after the sun has set in Porterville, the still of the night is shattered by blasts of a chainsaw... and screams of flesh-ripping punishment. At the age of ten, Sally Diamon witnessed the brutal murder of her parents. Alone in the world, she raised her little brother as best she could, haunted by nightmarish memories of the killings and savoring an ever-growing taste for revenge. She's now a quiet young woman - timid and harmless most locals would say. But they don't know a thing about Sally, who is obsessed with gruesome images of violence, torture and retribution. Sally might live the life of a small town librarian by day, yet she is something completely different by night. And the night is coming and the hunt will begin again, with Chainsaw Sally acting as judge, jury and bloody executioner of those who are evil in her eyes.