Joy Humboldt is going through rather a challenging patch in life. She's finally broken up with her manipulative jerk of a boyfriend. The next morning, she heads off to the pound to adopt a dog--a huge mixed breed she names Blue--but later that day, at her job at a barista at a coffee shop that's not Starbucks, she mouths off to a customer she thinks is being unreasonable. It's really quite reasonable, given her behavior, when her boss fires her on the spot.
But then a neighbor connects her with a friend of a friend, and she buys a dog walking business. Things are looking up, right?
Then she finds one of her new clients dead. The woman who sold her the business has disappeared. And the police seem strangely interested in only certain aspects of the crime.