In 1919, Milton Hershey is king of the chocolate business. But everything changes when in a Post WW1 sugar price drop, a rush of competitors spring up, including his former employee HB Reese, who will go on to create the best selling candy on the planet. But Reese isn't Hershey's only rival, when a brilliant marketer soon comes up with not one, but two of the most iconic candy bars in history.