When her daughter Beth dies suddenly, Peggy Andrews is left to pick up the pieces and take care of her granddaughter Flo. But sorting through Beth’s things reveals a secret never told: Beth was sick, with the same genetic condition that claimed her father’s life, and now Peggy must decide whether to keep the secret or risk destroying her granddaughter’s world.
Five years later, Flo is engaged and moving to New York with her fiancé. Peggy never told her what she discovered, but with Flo looking towards her future, Peggy realises it’s time to come clean and reveal that her granddaughter’s life might also be at risk.
As Flo struggles to decide her own path, she is faced with the same life-altering questions her mother asked herself years before: if a test could decide your future, would you take it?
