Pirates of the Caribbean: At World's End.

The plot of the fourth installment of the 'Pirates of the Carribean' franchise nearly became public knowledge this week after a copy of the film's script was found in a London cafe.

Johnny Depp began shooting Pirates Of The Caribbean: On Stranger Tides, his latest big-screen outing as Captain Jack Sparrow, in Hawaii earlier this month.

But the secrecy surrounding the film's storyline was nearly blown when movie workers accidentally left a copy of the screenplay behind after a breakfast meeting in the British capital - sending Disney studio executives into a panic.

However, an embarrassing leak was prevented after a film fan found the 194-page document and handed it in to editors at Britain's The Sun newspaper.

And the unnamed good Samaritan refused to take a sneak peak at the script, telling the publication, "I'm a big fan of the films, but I managed to resist the urge to have a read. I want to enjoy the movie when it comes out."

A Disney spokesperson says, "It's good to see Sun readers are honourable citizens."