After fierce struggle, the leaders of the Northern Gang, O 'Banion, Wes and Derossi, were successively dismissed. Finally, Capone was determined to get rid of baggs Moran, so he and the bodyguard and top killer Jack McGurn carefully planned the Valentine's Day massacre that shocked the whole country. McGurn, nicknamed "Machine Gun", was an aspiring boxer when he was young. After his boxing career failed, he turned to criminal activities and became a member of Capone's circus gang. Carpen appreciated McGurn's professional ability as a bodyguard and killer, and specially arranged him in Lexington Hotel headquarters. No matter in football field, baseball field or nightclub, Megan always follows Capone everywhere to protect the black boss. Joey Arlo, an opponent of the Northern Gang, offered a reward of $50,000 for Capone's head, but every murder was smashed by McGurn, and every time the assassin was killed, he held a buffalo nickel in his hand, which became a symbol of McGurn, meaning that the assassin's life was only worth a nickel!