Di Miao Miao is a detective who has an extremely high IQ but lacks the ability to take care of himself. Having once cleared Bai Wang Wang's name in a case, he gained an assistant (a maid) to take care of his daily life. Since then, a cat-like person and a dog-like person now live under the same roof. During this time, Miao Miao applies his reasoning skills in every aspect of his daily life, while Wang Wang simply looks after him