Marnie, a little indoor cat with a passion for police investigations, learns that burglaries are taking place in her small country village. Delighted to leave her comfort, she goes on a secret mission to stop the criminals! Marnie finds help from three wacky animals: a yoga-loving rooster, a funny zebra and a cowardly guard dog. Wrongly accused of being the thieves, they are drawn into a harrowing adventure to prove their innocence.