After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New York City to tag along with an NYPD homicide investigation team for research purposes.
When Clary Fray's mother has disappeared, Clary joins a band of Shadowhunters; demon killing hunters, and gets caught up in a plan to save the world.
Shocked to discover that her bland and unremarkable computer consultant husband is a skilled international spy, an unfulfilled suburban housewife is propelled into a life of danger and adventure when she's recruited to work alongside him to save the world as they try to revitalize their passionless marriage.
