Sisters Lauren and Stephanie from Essex are 20something siblings mystified by their weight gain. They've each put on two stone over the last two years, tipping the scales over into the overweight category. Lauren is even training for the marathon but has yet to lose a pound. The girls think they eat healthily, but Stephanie's grab-and-go habits and Lauren's social suppers suggest otherwise. Once they learn the shocking truth of what they're really eating, will they be able to stick to a healthy eating plan, nip their weight gain in the bud and lead a healthier lifestyle in the future? Plus, when it comes to eating, once we pop most of us can't stop, so in this episode the secret cameras record mischievous and tasty traps set for the public, proving just how easy it is for anyone to succumb to secret eating.