After Liu Xing helped the teacher find the car key, he imagined that he could be a detective, began to study the Complete Works of Sherlock Holmes, and claimed to be "Sherlock Xing". He almost analyzed everything and others in the family felt bored of him. Because Xia Yu damage other's toy, he secretly takes some things from home to sell, Liu Mei mistakenly believed that Liu Xing deliberately created "crime" to analyze and prove himself. After reconnaissance, Liu Xing pointed out that the real criminal was Xia Yu, and Liu Xing asked Liu Mei to restore his reputation.
刘星由于帮助老师找到了车钥匙，而幻想自己能当侦探，开始研究《福尔摩斯全集》，并自称为"福尔摩星"，总是神神密密分析这个分析那个。夏雨因为要赔朵朵的玩具，偷偷拿家里的一些东西去卖，刘梅误认为是刘星故意所为。刘星经过侦察，指出真正的罪犯是夏雨,刘星要求刘梅恢复他的神探名誉。
