They are very happy together but their relationship is marred by John's constant fear of being discovered by his wife(Leung Yam Kei) who tends to monitor her husband's whereabout very closely. When Mary learns from a friend at work that she had used pregnancy to make her boyfriend divorce his wife and be with her, Mary tries to do the same and manages to get herself pregnant. However, when John learns of her pregnancy, he turns into a rage and tells her he can't leave his family and be with her. Just then, they get a surprise visit from John's wife. Apparently she has been suspicious of her husband and has come back to check on him. John is forced to choose between his family or Mary. When John chooses his family over her and leaves with his wife, Mary decides to abort the baby.

Not believing in real love anymore, Mary returns to work with a new attitude, trusting nobody but money. She agrees to become Peter's mistress for $100,001 a month. Unlike John, Peter is mentally and verbally abusive to Mary. He likes to flaunt her in front of his friends and even offers to share her with his business associates in order to expedite his business dealings.

One night after some heavy drinking, Peter vomits in Mary's car just when she was dropping him off. Half-drunk herself, Mary drives to a car wash where Paul(Lai Yew Cheung) works as an attendant. Seeing she was in no condition to drive, Paul takes Mary back to her home. Mary returns the next day to thank him. From then on, Mary would make frequent visits at the car wash. During one such visit, they get to know each other better but Mary chooses to hide her profession from Paul.

During dinner with Peter one night, Peter's wife happens to drop by the same restaurant. Mary is told to leave through the back door immediately. A very unhappy Mary arrives home to find Paul crouching outside the gates of her apartment. Mary has apparently forgotten that she had asked Paul to help her fix one of her appliances. Paul senses Mary's unhappiness and tries to comfort her. They fall in love that night and begin to have a relationship.

At Mary's coaxing, Paul agrees to accept her financial help and open his own car wash shop. In the meantime, Peter incurs heavy debt from his losses in the stock market. When he finds out that Mary has been seeing Paul, not only did he rob her of her jewelry, he also depletes her bank accounts by forging checks using her name.

On the day of the new car wash's grand opening, Peter arrives with his creditors demanding that Mary should pay for his debts. When Mary refuses, Peter announces his relationship with Mary and humiliates her in front of her friends and relatives, including Paul and his parents. A fight later breaks out ruining the whole celebration. Mary is hurt in the event and is hospitalized.

Paul returns to his old job at the car wash shop. He has a hard time coping with Mary's past and could not find it in himself to forgive her. Mary's co-worker Anne(Wong Fung King) stops by and gives him a lecture about love and forgiving. She gives him Mary's address at the hospital and urges him to visit her.

Paul finally decides to forget about Mary's past and get back with her. But when he arrives at the hospital, he sees Mary in the arms of another man -- John. John has divorced his wife and has come back to be with Mary. He even proposes to her.

Paul receives a call one day from Anne telling him to come to Mary's wedding. But on arriving, he realizes that John's bride isn't Mary. Anne reveals that it is only a test to see if Paul still cares for Mary. She then tells him that Mary has decided to leave the country. Paul arrives at the airport just in time to stop Mary from leaving and manages to persuade her to stay.