Overview: MA KEUNG tells KA-ZA what had happened between CHAN NGAN and him long time ago. MA KEUNG used to think that CHAN NGAN was not studying hard but he later discovered that he was very interested in chemistry. MA KEUNG therefore helped CHAN NGAN to ask many questions during chemistry class and he even help him to take away some chemical powder from the school for self experiments. One day, CHAN NGAN went to the lab to steal Magnesium and the school carried out investigation on it. MA KEUNG worried that the school would discover that he had been helping CHAN NGAN to steal the chemical powders so he told that teacher that CHAN NGAN had stolen the Magnesium. CHAN NGAN was expelled from the school… CHI-LEI is very excited that Nobel Prize nominee in Chemistry, MATTHEW CHAN, will be giving a talk in Hong Kong and MA CHONG gives her two tickets. CHI-LEI wants to take photo with MATTHEW CHAN but he rejects her after seeing MA KEUNG……