This is the first picture Hitchcock directed for which he wrote the screenplay himself.  In The Ring he chose the tale of a love triangle between two boxers and the woman they both love.

          Jack Saunder --a.k.a. "One Round Jack"-- (played by Carl Brisson) is a boxer on the traveling circuit who can knock out any opponent in a single round.  Jack has been traveling with his fiancée Nelly (Lillian Hall-Davis) --traveling, it seems, for somewhat longer than the use-date on the spark plugs of their love, if you get my drift.  Along comes Bob Corby (Ian Hunter), a fellow boxer, who falls in love with Nelly himself and sees an opportunity to knock "One Round" out of the ring and out of Nelly's life.  The two men fight.  Bob wins, and then cleverly hires Jack as his sparring partner.  One thing leads to another and, before you know it, Bob has run away with Nelly.

          Needless to say, "One Round" gets a rematch, and, by golly, THIS TIME IT'S PERSONAL!    It all goes down at the Albert Hall.