New series. Chef Tom Kerridge recruits and mentors a group of struggling dieters, offering them advice on ways they can lose weight with long-term results. After losing over 12 stone himself through a combination of diet and exercise, Tom uses his own personal experiences to help the 13 dieters reduce their calorie intake, demonstrating how they can create their own simple, low-calorie dishes. Meeting the group for the first time, Tom lays out what they can expect from their weight-loss journey, and begins with tackling the issue of comfort eating, a problem that many of the group struggle with.