One Piece: The second pirate era (OOC/ Private)
We'll go ahead and say Luffy already found the One Piece, became the next Pirate king and everything. After his glorious adventure, and tales of beating some of the strongest pirates on the ocean, it drove yet another wave of rogue souls to the oceans. In this second wave, everyone's goal is not to find the big hidden treasure, but to see who can get the bigger bounty. The bigger your bounty, the quicker you can associate yourselves with the royalty of the ocean. Who knows, you might even run into Monkey D. Luffy himself...
Be warned, however. The more infamous you become, the harder it becomes to go unnoticed. The harder that gets, the more navy cannons you may have to deal with.