The young, charismatic, and enigmatic Rudy Kurniawan is considered to be the greatest wine savant of all time. His sharp palate measures the multiple layers of a wine bottle--the fruits, yeast and vinegar balance, even the year of manufacture. While enjoying a lavish lifestyle with an extravagant group of wine collectors, he makes his fortune buying cheap wine and selling it as vintage Burgundy for millions. SOUR GRAPES is the unbelievable true story of how Kurniawan, an Indonesian immigrant, committed one of the greatest wine frauds in U.S. history. An epic quest for truth, the film showcases the vulnerable, superficial, and outright humorous narrative of what is and what isn't.