This film depicts a Hong Kong police station's decision to send a new police officer, Zhou Xingzhi, to disguise himself as a seeker and infiltrate a private prostitution camp after racking his brains and doing nothing to crack down on the case. He uses secret video footage to search for evidence. In a crackdown on pornography, Zhou Xingzhi was discovered by the owner of the prostitution camp, tied him up and hung a prostitute in front of him, sexually abusing the prostitute. The police officers who were monitoring outside did not intervene in time to prevent the rescue, but ultimately cracked the private prostitution camp, But Zhou Xingzhi despised this behavior and left the police force.

本片描述一香港警署为破私娼寮一案,绞尽脑汁,无计可施情况下决定派一新进警员周星志假扮寻芳客混入娼寮中,且采秘密录影方式搜证，在一次扫黄行动中,周星志为娼寮老板识破,将他捆绑并在他面前吊起娼女,性虐娼女,在外监视之警察未及时出面阻止解救,最终虽然破获了私娼寮,但周星志却唾弃此一行为而离开警界。