Deserting his regiment in the aftermath of an injury, Torrent is just trying to get home to his fiancée without being robbed or arrested. Reporting the illegal saltpeter mine he finds on his return might be valuable enough for the army to overlook his truancy, perhaps even grant him a pension. If he's willing to betray Molly to make that report.
For Molly, chemistry has always been more useful than magic, especially now that supplying the opposing side with gunpowder is the only thing keeping her from being ousted from her own farm. After two years apart, Molly knows it's foolish to trust Torrent with either the mine or her heart. Unfortunately, Torrent's not the only one interested in Coriander Hollow.
Between Torrent's desertion and her own illegal mine, Molly has to decide whose secrets she's willing to protect and how far she's willing to go to protect them. And Molly hadn't counted on Coriander Hollow having secrets of its own...