Sunny Weston always wanted to be perfect . . . and that meant being thin. Now, after what seemed like a million years on the treadmill—and a million miles from the nearest brownie—she finally fits into those slinky black dresses she's been eyeing for years.

But being a perfect size doesn't necessarily equal a perfect life. Suddenly Sunny's best friends are all bitter and jealous. She's become a stranger in her own body. And though her longtime work crush, Adrian, is finally her boyfriend, she's totally confused now that charming, daringly dapper Cagney has appeared on the scene. Worst of all, she's worried that the recipe for a happy life might not be low-calorie after all.

Maybe it's time for Sunny to discover that the true secret to happiness isn't constantly feeling hollow.