Amateur detective and singing sensation Dinah Galloway has enough on her plate without having to worry about being pursued by a vengeful stalker. The red-headed twelve-year-old is in the running to sing in commercials promoting beautiful British Columbia. To clinch the job, Dinah has to get fit at a wellness retreat on Salt Spring Island. Veggies? Exercise? Yech! Grudgingly, though, Dinah admits that her lifestyle could be a little healthier. Off to Salt Spring she goes, along with the two other finalists: one friendly, the other the last word in sulky. Her friends Talbot and Pantelli make their usual disruptive appearances, along with Dinah's ever-anxious mother and cool, elegant sister Madge. Hoping to shed not only pounds but her crazed pursuer, Dinah learns the true meaning of personal best—it truly is how you play the game, not whether you win or lose.