Whitefriars London 1604

When her father bans her from fighting after an unfortunate incident with a stray sword, Lucinda Evans is determined to continue fencing. She recruits a small group of women with an urgent need to defend themselves, training them in secret as the Sisters of the Sword. When the Sisters discover that two of their number were victims of the same cruel predator, they set out to bring him to justice, no matter what it takes.

Robert McCrae, the infuriatingly attractive heir of a Scottish Lord, cannot fathom why any woman has a need to fight, but when he fails to protect his only sister, her reluctantly seeks Lucinda's help.

Plunged into a murky world of politics and duplicity, they are forced to work together, and faced with impossible choices. Loyalty or duty? Love or justice? The more he pulls, the more she pushes, and despite all of McCrae's attempts to keep har safe, Lucinda strides on into danger, a danger she must ultimately face on her own.