After crashing and burning during his PhD viva, Mason Ambrose is offered a large amount of money to go to a mysterious tropical island — Isla de Sangre. His employer is wealthy recluse Edwina Sabachtani whose daughter has supposedly lost her sense of right and wrong after a diving accident. Mason is to use his knowledge as a philosopher to instil a conscience, a moral compass in the child. Mason happily instructs her in schools of thought, from the stoics to the epicureans, but it is when he introduces Londa to the Beatitudes that the seeds of a rampaging sense of justice are sown. Venturing from the confines of the island, Londa sets out to create a world that is more just. But when she takes her crusade too far, kidnapping a boat full of wealthy industrialists, Mason realises he must take desperate measures...