Twenty-one-year-old Megan Cartwright has never been outside the small town she was born in but one winter's day in 1966 she leaves everything behind and sets out for London. Ahead of her is a glittering new life, just waiting for her to claim it.

But left behind, her family begins to unravel. Disturbing letters from home begin to arrive and torn between her independence and family ties, Megan must make an impossible choice.