When Heather Shepherd takes a walk downtown, the last thing she expects to see is smoke on the horizon and a fire near Donut Delights. She's horrified when it turns out that the fire is a case of arson, and is determined to get to the bottom of the mystery and help her hubby, Ryan, at Hillside PD. Armed with her fiery attitude, Amy's witticisms and a lot of free time while the renovations at Donut Delights finish up, Heather sets off on another sleuthin' adventure. However, things aren't simple at all: the suspects are plentiful, the local officers are less than helpful, and a surprise visit from Bill and Colleen throws Heather's focus off target. Heather must get the answers and prepare for the reopening of her store with her newest creations: Raspberry Mojito Donuts, or risk losing her reputation as both prime baker and sleuth in Hillside.