This quest is not available in game.
Report the planned Bloodsail attack to Fleet Master Seahorn.
Shiver me timbers! So the Bloodsail Buccaneers are planning some sort of attack on Booty Bay? Why, the nerve of those scoundrels. Booty Bay will always be run by the Blackwater Raiders!
This is bigger than I thought. Report what you have learned to Fleet Master Seahorn at once! The ol' sea dog is around town somewhere....