Have you ever tried teaching a goldfish to play ball? Or cuddling with a lizard? Exactly! That’s why Theo believes a dog is the best choice. Whenever his father is at work, Theo spends time with his neighbor Flora, who works at a pet store. One day, they find an abandoned animal, and Theo is overjoyed. Although he’s not sure if the found animal is even a dog, it doesn’t matter. Theo immediately welcomes Lotto into his heart. But then, dog food is stolen from the pet store, and suspicion falls on Flora. Theo is certain: Flora has nothing to do with it! And he will prove it together with Lotto. The two of them start their investigation. It’s a wonderfully quirky crime story about friendship, love for animals, and true detectives. Can goldfish learn to play ball? And can you cuddle with a lizard? Of course not! That’s why Theo knows: a dog as a pet is the best choice. When Theo's father is not home, he enjoys spending time with his neighbor Flora, who works at a pet store. One day, they discover an abandoned animal, and Theo is thrilled. Could this be the dog he has been dreaming of for so long? Theo isn’t quite sure who or what his new furry friend is, but he immediately takes him to heart and names him Lotto. However, when dog food is stolen from Flora’s pet store and suspicion falls on her, Theo is determined to prove her innocence. Together with Lotto, he sets out to find the truth.