Two years after his brother's murder in jail, Department of Homeland Security K-9 Officer Kade Sampson is still haunted by guilt. No man should ever have to arrest his own brother, even if he is laundering money for a drug cartel. Fortunately, Laia Velez-his brother's gorgeous widow-never learned the truth about Kade's involvement. But when she asks him for help, he knows that his trouble with the cartel is far from over...

Kade is the last person Laia wants to call. But between her house being thoroughly trashed and the uneasy sense that she and her young daughter are being watched, Laia isn't taking any chances. The cartel wants something from her. And Kade and his K-9 partner, Smoke, are her only chance to survive whatever fresh hell is coming their way...

Now Laia and Kade are trying to stay one step ahead in a game that's growing more deadly by the minute. But what the cartel wants, the cartel gets. And Kade is running out of time to save the woman he loves from the same fate that killed his brother...