"Former police officer Cassie Dewell is trying to start over with her own private investigation firm. Guilty about not seeing her son and exhausted by the nights on stakeout, Cassie is nonetheless managing...until an old friend calls in a favor: she wants Cassie to help exonerate a man accused of assaulting a young girl from an influential family. Against her own better judgment, Cassie agrees. But out in the Big Sky Country of Montana, twisted family...

Eighteen-year-old Robert Weekes is a practitioner of empirical philosophy--an arcane, female-dominated branch of science used to summon the wind, shape clouds of smoke, heal the injured, and even fly. Though he dreams of fighting in the Great War as the first male in the elite US Sigilry Corps Rescue and Evacuation Service--a team of flying medics--Robert is resigned to mixing batches of philosophical chemicals and keeping the books for the family...