It's Hero Day at Loch Mallaig Elementary, and Bread on Arrival bakehouse owner Carol MacCallan thinks she's really made the grade when her granddaughter, Maisie, gives her top marks for her amateur detective work. Others at the Michigan town's grade school have caught wind of Carol's skills as well, and a handful of teachers ask her to look into the disappearance of some odd supplies from their classrooms. Unfortunately, the simple theft investigation...