Ho-fan has lost his memory. He only remembers Ming-kwan. Lik-kei interrogates Lui Dong-lo as he just has to find the truth. Ho-fan commits the chums’ relationships to memory. He surprisingly listens to Wing-yum’s advice and regards her as his fiancée. Lik-kei and Chung-ying look up Dong-lo’s papers. They have doubts as they also find out Ming-kwan has met up with a lawyer called Shum Ching-wai. Chung-ying hooks up with Ming-kwan and asks him to tell her what he knows. Lik-kei gets worried and peeps at the duo. The next day, Lik-kei nervously asks Chung-ying about her relationship with Ming-kwan. But Chung-ying confirms she and Lik-kei have gone their separate ways. Ming-kwan lies to Ho-fan about offering help in handling company matters in an attempt to win over Ho-fan’s trust. Meanwhile, Wing-yum and Ho-fan are strolling at some beach. She points out Ho-fan once proposed to her at the beach. She wants him to again tell her he loves her.
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.
