After a prominent senator's son is murdered, Capitol K–9 Unit Captain Gavin McCord wants answers. The senator was a mentor to Gavin, and he'll stop at nothing to bring the killer to justice. With his team of elite K–9 cops and his loyal dog Glory at his side, Gavin discovers that a child at Cassie Danvers' nearby foster home may have witnessed the murder.

He's drawn to the determined and beautiful woman, but she doesn't want him interviewing her traumatized charges. Yet trusting Gavin is the only way to stay one step ahead of the deadly gunman when Cassie becomes a target.

Capitol K–9 Unit: These lawmen solve the toughest cases with the help of their brave canine partners.