The burglar black cat (Xu Guanjie) robs the diamond of an international criminal organization and slips away with a variety of tools. The white gloves left by the black cat at the scene make the Hong Kong police mistakenly think that the perpetrator is the "white glove" of an international robber. The police invited the American bald detective (Mak Jia) who had been chasing white gloves for many years to investigate the case, and sent capable policewoman he Dongshi (Zhang Aijia) to assist. On the other hand, the Italian mafia, the owner of the diamond, asked the white glove to arrive in Hong Kong to retrieve the diamond. Bald detective and black cat do not know each other, under coercion and inducement, the black cat decided to assist the detective to get the white gloves. The trio made a series of troubles in order to recover the lost diamond. When the black cat finally got the diamond, the lurking white gloves also appeared at the same time.