May Day 1646: Ruth Flowers finds herself suddenly, brutally, alone. Forced to flee the household of Oliver Cromwell, the only home she has ever known, Ruth takes the road to London, and there is given refuge by Lizzie Poole. Beautiful and charismatic, Lizzie enthrals the vulnerable Ruth, who binds herself inextricably to her world. But Ruth is still haunted by fears of her past catching up with her. And as Lizzie's radical ideas escalate, Ruth finds herself carried to the heart of the country's conflict, to the trial of a king.