In The Calorie Counters, Maggie's sister, Jordan, gets engaged to the man of her dreams, she dives headfirst into planning the perfect wedding - from the centerpieces to the napkin colors to the perfect bridesmaid's dresses - dresses that are only carried up to a size 12. There's just one problem: Maggie is nowhere near a size 12. Reluctantly, Maggie agrees to join a weight loss group called The Calorie Counters in order to lose the weight, fit the dress, and ensure that Jordan's wedding is perfect. At the Calorie Counters, Maggie meets Charlie who acts as her self-appointed mentor while working through his own insecurities. As Jordan buries herself in the wedding arrangements and Maggie uproots her life for the chance to fit into a world that is not always kind to the overweight, the sisters begin to realize the secrets they have been keeping from themselves and each other.