Curator Chloe Ellefson is off to Minneapolis to help her friend Ariel write the proposal for a controversial restoration project. The Minnesota Historical Society wants to convert an abandoned flour mill, currently used as shelter by homeless people, into a museum. But when a dead body is found stuffed into a grain chute, Chloe's attention turns from milling to murder.

Back in Milwaukee, Chloe's love interest, Roelke, has been slammed with the news that a fellow officer was killed while on duty. Sifting through clues both past and present, Chloe and Roelke discover dangerous secrets that put their lives-and their trust in each other-at risk.