Wealthy businessman Shing commissions Shan to write a biography of his late wife Ling. Shan goes to pick up love letters written by Ling when Shing receives a blackmail letter for $10 million or else Ling's past as a prostitute would be disclosed. Kong is in charge of the case. Shing receives blackmail photos of Ling with a customer. Ping discovers that the customer is Ho.
