A circus is arriving in a small town full of joy. A variety of cool performance brought a lot of joy into the town. The circus established a detective agency led by Detective Meow, which help people solve various problems. The emergence of the circus has attracted the attention of Dr. Oolong in the town. Dr. Oolong is a small-minded and vicious person. To kick the circus out of the town, he come up with conspiracies and let his fellows to carry out. Therefore, brave Detective Meow will fact a lot of difficulties and plots with his friends-Piggy Pea and Parrot Q. Through their work team and wisdom, will they conquer Dr. Oolong?