LAI-SUM has once said that she will never forgive SUM because of one thing that happened on their wedding day. So everybody tries hard to recall what that was. LAI-SUM has decided to divorce SUM, saying that he was disloyal to her on their wedding night. The FOUR KINGS give SUM’s parents, CHING YEE-CHEUNG and HANG, a box. They tell the old couple there is evidence of SUM’s disloyalty inside. But they can only find a tissue with a lipstick mark and LAI-SUM’s wedding ring. After going through what happened on their wedding day in his mind, SUM finally figures out why LAI-SUM is so mad about him. Later, he takes her to the hotel, which she believes he took another woman to on their wedding night, to explain to her. With the help of YEE, he puts on what happened that evening. Everything goes very smoothly until YEE sees his ex-girlfriend, YAU KA-LEI, and her husband, MIKAMI, in the balcony of the next room……