It's late spring on picturesque Mackinac Island, Michigan. Allie is prepping her Historic McMurphy Hotel and Fudge Shop for the start of the tourist season and her best friend Jenn's wedding. But when Jenn's fianc Shane, a crime scene investigator on the island, misses a dinner date, the two friends go looking for him. Led by Allie's bichonpoo Mal into an alley, they come upon Shane standing over a body with a bloody knife in his hand. Shane won't say what's happened, just tells them to call 911. As the CSI is taken into custody by his colleagues, including Allie's beau Rex Manning, the fudge maker vows to prove her friend's fianc is not a killer--before the ceremony turns into a jailhouse wedding...