This documentary takes a look at the growth of all-you-can-eat restaurants on Britain's high streets. All-you-can-eat restaurants offer limitless servings of food in a buffet-style for a fixed price. They have prompted a fad diet that is becoming increasingly common among the British. Narrated by comedian Johnny Vegas, the doc features interview with diners who can eat four days of calories in one sitting and the canny restaurateurs who know every trick going to fill people up quickly.