As a high-powered Wall Street lawyer, Sarah Talbot believed her world was comfortable and secure?until her beloved stepson was found dead of a drug overdose in Paris. Her initial grief is compounded when she learns that his body was used to transport heroin by an unstoppable European cartel. Trained by British SAS, Irish-born Sean Egan has no problem killing whenever and wherever someone has to die. Dealing with death is second nature to him. So when his sister?s drug-poisoned corpse is found floating in the Thames, he knows it?s not an accident?it?s murder. Bonded by their shared loss, Egan and Talbot come together, vow to find those responsible, and make them pay. Pursuing an enemy known only as ?Mr. Smith? and hunted by a master assassin, they cannot imagine the truth they will uncover?and the dangers they will face. All they know is that they cannot stop until they have their revenge?no matter the cost.