It's back to school time in the peaceful Maine town of Tinker's Cover, and for mother-of-four Lucy Stone it isn't a moment too soon. But trouble at the local elementary school soon has the sometime crime-solver juggling family, job, and night classes with another mystery to solve. And it starts with a bank.

A bomb goes off with the noon launch bell, but not before all the kids are safely evacuated, and Carol Crane, the new assistant principal, is hailed as a hero. But days later, Carol is found murdered and everyone is stunned when the most popular teacher at the school is arrested for the crime. However, not everyone is buying the open-and-shut case, including Lucy Stone, who senses there's more to things than meets the eye. It soon becomes clear that Lucy is flirting with danger, as sizzling secrets and explosive surprises provide a primer for the most diabolical of motives. Hot on the trail of a clever killer, the dedicated mom and seasoned sleuth must harness the coverage and cool aplomb to uncover a crime that just might give her an education in the fine art of murder.