When an American gangster is found murdered in London under suspicious circumstances, Sir Reginald Crowe, British banker and friend of Mr. Jellipot, is accused of the crime. Brought before a coroner's court, he's on the virge of being arrested and indicted when another American is found killed under similar circumstances -- a crime that Sir Reginald could not have committed. But who is responsible for these awful acts of violence? And who owns the huge sum of money that had been in the victim's possession at the time of his death? Mr. Jellipot follows the trail of clues from London to the Big Apple, where he must confront the King of Crime himself -- Al Capone, the notorious Scarface -- during the interplay of a quiet dinner in New York!