V.C. Andrews' Dollanganger Saga Flowers in the Attic

In 1957, the Dollanganger children live happily with their parents in Pennsylvania, but their lives take a devastating turn after their father's death, leaving them at the mercy of their ruthless and sadistic grandmother, Olivia. Four months later, Corrine, their mother, announces she will move to Virginia to live with her wealthy parents, Foxworth Hall, where she subjects her four children - Chris, Cathy, Carrie, and Cory - to a life of captivity in the attic. As they struggle to survive amidst neglect, abuse, and incestuous threats, Cathy and Chris hatch a plan to escape their tormentor and flee to Florida, determined to bring justice to those who have wronged them.