一宗槍殺案，便衣沙展高力基遇上「木獨」又「棘手」的目擊証人李浩帆。力基被指派貼身保護浩帆，兩人由陌生與抗拒，漸漸接受對方。此時，由浩帆做大股東的成衣公司被發現捲入犯罪交易，公司高層葉長樂、葉明鈞父子牽涉其中。力基聯同浩帆，以及其任職大律師的妹妹李頌盈合力追查，期間力基、頌盈產生糾纏不清的感情，力基的姊姊高詠音亦與浩帆成為鬥氣冤家。命運將四人拉在一起，而一宗廿多年前的懸案，也因此再次掀開序幕……
Aliases
一宗槍殺案，便衣沙展高力基遇上「木獨」又「棘手」的目擊證人李浩帆。力基被指派貼身保護浩帆，兩人由陌生與抗拒，漸漸接受對方。此時，由浩帆做大股東的成衣公司被發現捲入犯罪交易，公司高層葉長樂、葉明鈞父子牽涉其中。力基聯同浩帆，以及其任職大律師的妹妹李頌盈合力追查，期間力基、頌盈產生糾纏不清的感情，力基的姊姊高詠音亦與浩帆成為鬥氣冤家。命運將四人拉在一起，而一宗廿多年前的懸案，也因此再次掀開序幕……
Aliases
Because of a fatal shooting case, plain-clothes Sergeant Ko Lik-kei runs into a “dull” and “troublesome” witness called Lee Ho-fan. Lik-kei is instructed to protect Ho-fan at all times. Initially, the duo are strangers that cannot stand each other. They then gradually get along. Meanwhile, an apparel company of which Ho-fan is a major shareholder is found to have involved in illicit dealings. Yip Cheung-lok and his son Yip Ming-kwan, who are member of senior management, are associated with these activities. Lik-kei teams up with Ho-fan and Ho-fan’s younger sister Lee Chung-ying, who is a barrister by profession, to investigate. Lik-kei and Chung-ying get entangled in a relationship in the process. Also, Lik-kei’s elder sister Ko Wing-yumand Ho-fan get along sometimes and provoke each other at other times. Fate has brought the foursome together, causing a case that has remained unsolved for more than twenty years to be reopened.
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