The team of health professionals heads to Prosperous, Co Kildare to help Debbie Mason, her partner Peter, and their two sons, eight-year-old Ryan and five-year-old Luke. Debbie suffers with depression, and consequently struggles to maintain a healthy diet and exercise, while Peter is a sugar addict, with his extreme intake of fizzy drinks causing his teeth to start turning black and decayed. Although Luke likes vegetables, his sibling Ryan refuses to eat much more than chicken dippers. The family find out the effect their lifestyle is having on their health, then the team gives them eight weeks to follow their advice before retesting them.