The island fishing village of Eastport has plenty of salty local character. It also has a sweet side, thanks to Jacobia "Jake" Tiptree, her best friend Ellie, and their waterfront bake shop, The Chocolate Moose. This summer, Eastport's favorite lovebirds, kindergarten teacher Sharon Sweetwater and Coast Guard Captain Andy Devine‚ are getting married. The gala reception is sure to be the fête of the season, especially with a wedding-cake-sized whoopie pie. 

For Jake and Ellie, the custom-ordered confection will finally reel in some much-needed profits. But the celebratory air, and sweet smell of success‚ are ruined by foul murder. When Sharon's ex-boyfriend is poisoned with an arsenic-laced milkshake, Andy is jailed as the prime suspect, and the wedding is cancelled‚ whoopie pie and all.

Then Sharon makes a shocking - and fishy - confession and ends up behind bars, too. With the fate of The Chocolate Moose at stake, it's up to Jake and Ellie to catch the poisonous predator before someone else sips their last dessert.