At the age of ten, Sally Diamon and her younger brother Ruby witness the brutal murder of their parents. Alone in the world, Sally raises Ruby, haunted by the memories of her murdered parents, and an ever growing lust for revenge. Now, a young woman inspired by horror movies and comic books, Sally lives the life of a small town librian by day... and something completely different by night. When the sun goes down in Porterville, the hunt begins, with Chainsaw Sally acting as judge, jury, and bloody executioner, of those who are evil in her eyes.