In Napa Valley, Calif., the six remaining food truck teams go head-to-head in a grape-stomping competition with a unique prize. Host Tyler Florence challenges them to incorporate red wine in a dish for a taste test he judges, and he forces the teams ... (more)to get back to their roots and compete for sales the old-fashioned way. After two days of selling, one team has a stellar sales total, and one truck must close its doors for good.