It's bitter cold in Rosedale, Tennessee, the most frigid January in decades. The kind of chill they used to describe as requiring sleeping with three dogs just to make it through the night. Mae December has found yet another body, this one on the banks of the Little Harpeth River. It's another murder for her boyfriend, Sheriff Ben Bradley, to investigate. Only Mae's broken her wrist, which makes helping out with the case difficult. That's okay, because the murdered man was found near a puppy mill, and all evidence points to the owner as the killer. Surely the case will be a slam dunk. Mae's injury also hampers her ability to run her dog boarding business and care for the three pit bull puppies she's fostering, so she hires Ray Fenton, the kid who blew the whistle on the now-shuttered puppy mill. Meanwhile, Sheriff Bradley's office manager, Dory Clarkson, struggles to pass the physical tests that will allow her to fulfill her dream of becoming a deputy, Mae and her friend Tammy are busy planning Tammy's Valentine's Day wedding to the brother of Mae's deceased fiancé, and Detective Wayne Nichols must revisit his painful past as he fights to free his foster mother from prison. Rosedale is the last place you'd expect to harbor a killer. Now the sheriff's department must solve its third murder in a year. Three Dog Day is the third book in the Mae December mystery series, which began with One Dog Too Many.