Chet the dog is less than enthusiastic about the Little Detective Agency's next case. Chet and his human partner, PI Bernie Little, have been hired to find a missing person - only the missing person is a cat. Miss Kitty, an internet sensation, has disappeared, and Chet and Bernie have been hired to find her before her many followers realise something is wrong.Miss Kitty belongs to Bitty, a sweet teenage girl who lives with her mum. Bitty and her mother are struggling financially, but the arrival of Miss Kitty and the chance discovery of her social media appeal has changed everything. Bitty now has sponsors, a high-powered agent, and all the tools needed to thrive online, and real money is flowing in. At least, it was. With Miss Kitty gone, the family's income is on the line.The case presents a slew of challenges for Chet and Bernie. For one thing, a potential witness is a pig named Senor Piggy who may be in possession of an important piece of evidence. For another, it seems like a possible perp has been killed twice - and there's evidence implicating Bernie in the crime.