Nick Markos has inherited the burden and shame of his brother's dealings with terrorists, who demand he return the millions he skimmed. Hoping to uncover a plotted attack, the Feds install DARK Officer Vanessa Wade undercover as Nick's glamorous fiancée. Despite her expertise, Vanessa has grown to dislike undercover work. Under orders to make sure the sexy and tortured tycoon is no traitor, she soon realizes that instead he's determined to regain his family honor—and his own. She tells herself to stay detached, but this man's kisses make her emotions spin out of control. As they work together amid gala social events and terror threats, Nick and Vanessa cannot deny their mutual attraction, but her deception makes Vanessa feel as false as the rock on her finger. Is their relationship only a charade? One that could explode—along with a terrorist bomb?