When Sophie Vasquez and her sisters dreamed up Puppy Promise -- their service puppy training school -- it was supposed to be her chance to bring some good into the world. But how can she expect to do anything when no one will take her seriously? Enter Harrison Parks: a rough, gruff, take-no-bull wildlife firefighter in need of a diabetic service dog. He couldn't be a more unlikely fit for Sophie or Bubbles -- the sweet Pomeranian she knows will be his perfect partner -- but when Sophie insists he give them both a shot, something unexpected happens: he listens. Even better, he keeps on listening, even as Sophie and Bubbles turn his lonely, uber-masculine world upside-down.