When her husband's scholarly interest turns to obsession, Lydia Carroll will do whatever it takes to save her family. She only knows one version of the story of Mary Stone Walker's disappearance: her husband's. English professor Frank Carroll has been fixated on the mystery of for years, crafting a narrative based on Mary's poetry and journals that insists that Mary lived past that night in 1939. As Frank's behaviour grows more erratic, Lydia sees that his interest has evolved into an obsession - one that threatens to destroy the family they have built together. Lydia throws herself into the mystery, hoping to solve it and bring peace back to her home. But as Lydia begins investigating, her son takes action with a plan of his own... one that will bring the family to a breaking point and change Lydia's destiny forever.