Four months ago: Sara Zapata’s best friend disappeared, kidnapped by the web of criminals who terrorize Juàrez. Four weeks ago: Her brother, Emiliano, fell in love with Perla Rubi, a girl whose family is as rich as her name. Four hours ago: Sara received a death threat…and her first clue her friend’s location. Four minutes ago: Emiliano was offered a way into Perla Rubi’s world—if he betrays his own. In the next four days, Sara and Emiliano will each face impossible choices, between life and justice, friends and family, truth and love. But when the criminals come after Sara, only one path remains for both the siblings: the way across the desert to the United States.