When Mondo Burgers' high-tech hamburger haven open across the street from the tiny Good Burger diner, it looks like the diner is done for, that is until Ed formulates a secret sauce that brings hundreds of new customers to their door. However, the manager of Mondo Burger is determined to get his hands on the sauce and put Good Burger out of business. Meanwhile, Ed and Dexter must rescue Otis, the world's oldest fast food employee, from the Demented Hills Asylum, and Ed.