SUM asks LUNG what kind of birthday cake he wants since Mid-Autumn Festival is his birthday. KEUNG thinks that SUM is excessively serious about it. SAI is curious when LUNG watches again a child programme “430 Space Shuttle” that was back in twenty-five years ago. SUM then reveals the engagement LUNG has made with Captain CHEUNG KWOK-KEUNG to meet in twenty-five years. Knowing that the mental arithmetic ability of LUNG is extremely high, HUNG decides to make his gambling plan. Taking the surgical operation to cure his foot as an excuse, HUNG hopes to cheat BO into lending him eighty thousand dollars. As to raise another twenty thousand dollars, HUNG gives LUNG a thousand dollars to bet on the horses for him. BO gets a call from his sister-in-law that she needs some money for a turnover. BO is in a dilemma as he has promised to lend the money to HUNG… Seeing that BO is so chagrined, LUNG promises to lend him the money……