Fiona Mahoney's past returns to haunt her present as a prizefighter from her hometown becomes the only suspect in a gruesome, high-society murder. No one in London knows what befell Fiona's family back in Ireland. At least, no one left alive. That is until her late brother's best mate arrives in the city for the bareknuckle bout of the century. Blood is spilled in the ring before the fight, and when Fiona is hired to clean it up, she finds that the boy from her past is now a dangerous man who may have answers she'd lost all hope of finding. But while she frantically tries to keep his neck from a noose, it becomes apparent that her own is at risk. Follow Fiona into her most chilling case yet, one that threatens to burn the precarious tightrope upon which she balances, and force her to decide, once and for all, on which side of the law she will choose to land.