Stella, a beagle, used her strong scent skills in her job as a chemical sniffing dog at airports until a mistake cost the life of her handler and best friend. Traumatized and suffering from ptsd, Stella is moved between different foster families as they try to help and rehabilitate her. Given a last chance on a farm with a mother and daughter, Stella must try her best to be a good dog, despite the fears that keep tripping her up.