John was a single father who raised 2 young children Jimmy and Jenny after his wife Anna passed away a few years ago. John designed shoes and sold them to eke out a living. However, his designs were not well sought after. His parents also worked part-time to supplement the household's income and put the children to school, but it was not enough. As a result, he and his family could hardly make ends meet.
One day, Jimmy and Jenny were playing outside their house when they saw an antique brooch lying on the field. It had a black jewel stone embedded. They brought the brooch home and showed it to John. John felt that the brooch seemed familiar, but when he asked his parents Marcus and Holly about the story of the brooch, they suddenly fell silent. They urged John to get rid of the brooch as soon as possible, so he decided to pawn the brooch. However, he was told that the brooch was not worth much money. John recognised the pawn shop assistant as his old classmate, Thomas, whom he had not seen for 15 years. They met for lunch that day, with John crediting the brooch for helping them meet again.
During the weekends, John invited Thomas to his house for dinner. Before he left, however, Thomas secretly made off with the brooch, which John left in the bedroom drawer. Jimmy witnessed it and told John about it. John was shocked by Thomas' duplicity. He immediately made a police report, but was told that Thomas had died in a bizzare car crash. At the time of the accident, the brooch was lying near the scene, and it was immediately seized as evidence. However, the brooch mysteriously disappeared from the pile of evidence recovered from the site of the car crash. Strangely however, John's financial situation in his household improved significantly after the brooch disappeared. He was offered a job at a shoe design company by its owner Charles Poon, who saw potential in him. There, John's designs became popular and the company managed to clinch several new deals. Things started to look up for John and his family and he soon forgot about the brooch and the supposed bad luck caused by it.
One day, John was watching television at home when he saw a news report about another car crash involving 3 men. The news report stated that the 3 men were involved in several spate of robberies that happened recently. Like Thomas' car accident, the same brooch was found lying near the accident scene. John's interest in the brooch was resparked, and he once again asked Marcus and Holly about the story behind it. Marcus and Holly gave a deep sigh and told him everything. It turned out John was not their biological son. They did not know who his biological father was, but his biological mother was Christine, their common friend. Years ago, Christine had a one-night stand. After that night, she and John's biological father never saw each other again. It was not long before Christine realised she was pregnant with John. Being naturally proud, she wanted to raise John on her own, but passed away during childbirth, and entrusted him to Marcus and Holly. The brooch was given to Christine by John's biological father during their memorable one-night stand, which became her favourite accessory. Marcus and Holly further mentioned that the brooch was buried along with Christine as per her wish on her deathbed, which was why they were shocked when John showed them the brooch. The brooch was said to bring bad luck, which was proved by the car accidents surrounding it, but John was not negatively affected as he is Christine's biological son. Upon hearing their story, John embraced Marcus and Holly, thanking them for raising him.
The next day, Marcus and Holly told John that they were inviting his boss over for dinner that night. John told Charles about it. He agreed, and John gave him his home address. When Charles arrived, Holly was busy cooking while John, Marcus and the children helped to set the table. At the dinner table, the group chatted happily when suddenly, a photograph dropped out of Marcus' wallet. Charles picked up the photograph, but when he saw Christine with Marcus and Holly in the photograph, he was in shock. "Christine?" he muttered under his breath. "Why? Do you know her?" Marcus asked. But what Charles said shocked everyone to the core. Years ago, he had a one-night stand with Christine after his car broke down in the heavy rain and she offered to shelter him for the night. After that, he went to the United States to work and they did not see each other again. He recently returned to Hong Kong to open another subsidiary company and find out how Christine had been doing. Marcus and Holly told him that Christine had passed away during childbirth and that John is his biological son. John, who had been raised with love, did not think twice about forgiving Charles. They shared an embrace, and Charles became part of John's life too. The brooch, as mysteriously as it had appeared outside John's house, returned to Christine's grave, this time for good.