Paris, 1794. Revolutionary fervour has erupted into the Reign of Terror. A young man, Paul Courtney, hides in a crowd watching as condemned dignitaries have their sentences carried out. Among them is the Comtesse de Bercheny, Constance Courtney, Paul's mother. As he watches her brutal execution, he knows he must avoid the same fate and fulfil his promise to her - to survive, no matter what. When Paul rescues a girl from attack the two form an allegiance, but with the world at war and traitors in every corner, just how far will Paul go to ensure his own survival?

Cape Town, 1806. Adam Courtney has spent his life in servitude to the navy and in the shadow of his father, the illustrious Admiral Robert Courtney. But when a visit home to Fort Auspice, Nativity Bay ends in tragedy, the fort destroyed and the Courtney family dead, Adam must accept his destiny and seek vengeance. Robert gives Adam the prized family heirloom, the Neptune sword, and makes his son swear on its blade that he will not rest until he has delivered justice. From Cape Town to Calcutta, on a quest for his family's honour, Adam discovers that the enemy he seeks may be closer to him than he realises . . .