When the Golden Retriever comes to Greenleaf Pet Clinic with nothing but an old collar, Dr. Clara knows there is something amiss. Nothing on it, no name, no identification, no report; just a small dog acting like he is in on a secret.
Together with her assistant Ben, Clara looks into the health center and uncovers hidden reports, deleted adoption records, a play bone with the same date, and riddles revealing a breeder gone missing. All leading her to the truth behind the mystery of the old collar: a tale of loyalty, betrayal, and bravery.