Armando Alvarez (Will Ferrell) has lived and worked all his life on his father's ranch in Mexico. So he's devastated to find out that his family's legacy is hurting financially. His younger brother, successful businessman Raul (Diego Luna), shows up just in him to save the day, albeit with his new fiancée, Sonia (Genesis Rodriguez).
Although things start looking up at first, they slowly take a turn for the worse when Armando falls for his soon-to-be sister-in-law and Raul's business dealings turn out to be more shady than legit. On top of all this, they've landed themselves in a war with Onza (Gael Garcia Bernal), the dangerous ring leader of Mexico's drug cartel.