Meet Fizz - the daring dog detective!Today Fizz starts his training to become an undercover police dog. The police dog tryouts were hard, and skills training will be even harder. But Fizz and his new friend Remi are given an extra challenge to test their detective skills. Trainee dogs are being injured and sent home. Sergeant Stern believes it's no accident. He wants to know who is doing this and why. Fizz and Remi must solve the mystery, or they won't graduate as undercover police dogs.