In the first episode of the new series Davina meets Sarah-Jayne Croft a 47-year-old teacher from Hampshire who has battled with her weight throughout her adult life. After reaching almost 25 stone, Sarah decided it was time to take action and is pledging to lose 10 stone to fit into a sexy superhero costume, which she bought a few sizes too small to give her an incentive. After seeing a fellow passenger on a plane making comments via text about her weight, Sarah-Jayne decided it was time to finally take control but will she succeed?