Human bones found in a furnace at an animal shelter just outside of Austin cause retired detective Al Quinn to be called in to work the case. Before he leaves the shelter, Al adopts a new companion, Tanner, a dog just two days away from being euthanized. Testing shows that the bones belong to more than one person. Al must deal with a pesky FBI human-trafficking team that butts into the investigation while he is training a new detective. At home, he has a houseful of people when he'd planned to live alone, not to mention his new pet. Add a burglary ring whose members threaten his housemates, along with Tanner, and someone will soon be seeing the dark side of Al Quinn.