When mathematician Aubrey MacLean's career implodes, she has no choice but to return to her rural Indiana hometown, at least temporarily. But small towns have long memories, and so does she, especially when it comes to Nick Thacker, the boy who broke her heart. Nick's life is routine: long shifts at the steel mill, plus a side business writing love letters for other people. It's enough to numb his regrets--until his first love returns, stirring up a past he thought he'd buried.