'The Unforgivable' is unforgivably grim

Following her release from prison after twenty years, Ruth Slater (Sandra Bullocks) attempts to make contact with her sister (Aisling Franciosi), who was only a child when she went away. Enlisting the help of a lawyer (Vincent D'Onofrio) who now owns the house she used to live, Ruth tries navigate post-prison life, but finds herself haunted by the crime of her past...