Plot: This is a story about Hong Kong Customs. The trio comprising Intellectual Property Investigation Bureau Senior Superintendent Hoi Fung, Trade Controls Bureau Chief Trade Controls Officer Kwan Pui-yan and Customs Drug Investigation Bureau Superintendent Wan Tsz-ki lead a contingent of elite customs officers and fresh-faced rookies, including Probationary Inspector Chan Ka-hing, to carry out diverse operations involving eggs, nuclear bombs, baby formula, heroin and much more