Meet Monty, the food-obsessed, naughty, and totally loving Golden Retriever who will do anything for his owner, Detective Constable Rose Sidebottom. Of course, as these things go, Monty is no ordinary dog and Rose is no ordinary hooman. Monty has a super-smart nose and a network of unique informers; while Rose has an uncanny ability to know when people are lying. Together they make a formidable team. But Rose is battling anxiety and her boss has put her on sick leave, so there's nothing much to do until a stranger begs for their help to find a missing person. The case soon becomes a murder investigation, and Rose's boss warns her not to interfere. But when dogs start disappearing too, Monty and Rose have no choice and set out to solve it.