8 August 1963: Britain wakes up to news of the biggest robbery in the country’s history. A train has been hijacked and robbed, 35 miles from its arrival in central London. The country is stunned. Who could be behind it? How did they pull off such an audacious raid?

Dolly Rawlins is free again. She has served the eight year prison sentence for her husband's murder and is now set to collect the six million pounds worth of diamonds that she stashed before she was sent down. The money will enable her to follow her dreams and start a new life. But her former cell mates have their own ideas...