Mary Portas embarks on a mission to transform the charity shop sector, starting with one of Save the Children’s worst-performing stores in Orpington, Kent. To understand the challenges, she rolls up her sleeves and works alongside the mostly retired volunteer staff. Shocked by the poor quality of donations, Mary leads a bold stunt at a London shopping center to highlight the issue. Back in Orpington, she launches a campaign to improve donation quality, but her efforts face resistance, leaving Mary questioning if she’s taken on too much.