A fad diet brings together an overweight woman (Moyer), her superficial sister(Christensen) and a short-tempered mother (Smith).A fad diet brings together an overweight woman (Moyer), her superficial sister(Christensen) and a short-tempered mother (Smith).A fad diet brings together an overweight woman (Moyer), her superficial sister(Christensen) and a short-tempered mother (Smith).