The museum displays an extremely precious diamond, the Sahara Diamond. The diamond was chosen by the ambassador of an African country and offered a high price for Andrew to steal. Andrew's brother John, who had just finished four years in prison, was eager to try again. In addition, they got two people to help. One is Mocky, who is good at driving, and the other is Alan, who knows how to explode. The burglary went smoothly and they got the diamonds, but were accidentally found by the guards when they pulled out. Alan was caught by the police with the diamond and in a hurry he had to swallow the diamond into his stomach. John and his accomplices attacked the police station late at night and rescued Alan. When asked about the whereabouts of the diamond, Alan prevaricated that he had hidden the diamond in a secret passageway of the police station. Helplessly, John had to venture into the police station again, but only found a fake diamond. John concluded that Alan had the diamond and kidnapped him. After a severe beating, Alan gave up the diamond in the bank safe. After careful makeup, John got ahead of the ambassador of some country and stole the diamonds from the safe.