The game is set in the continent of Babel, where the Tower of Babel looms large over seven nations. After the invention of alchemy led to its use as a tool of war that brought humanity to the brink of extinction, the seven nations struck an uneasy peace that led to a prohibition on alchemy for hundreds of years since. In the Continental Year 911, the nation of Lustrice broke the pact by assembling an army bolstered by alchemy, with ambitions of conquest over the continent. Led by Envylia, the six nations allied and struck down the rogue nation, casting alchemy once again to darkness. But 20 years after the war, alchemy once again begins to cause chaos in the land. 

(Source: ANN)

"If you are a pirate among pirates among pirates among pirates, then gather your steadfast crew of friends and set sail for our island." Upon finding an advertisement with these words on it for Omatsuri Island, the only recreational resort on the Grand Line, Monkey D. Luffy and his Straw Hat Crew set out for it immediately.

Enticed by the island's casinos, spas, beautiful women, and exquisite cuisine, the crew are eager to relax and enjoy themselves. Much to their disappointment though, they are told upon arrival that they will first have to pass Baron Omatsuri's "Ordeals of Hell." Once they complete this series of challenges, they will be able to enjoy the resort.

However, problems begin to surface the longer they stay on the island. As strange events continue to unfold, the Straw Hat Crew find themselves at odds with one another, disagreeing at every turn. Will the Straw Hat Crew be able to figure out the truth behind Omatsuri Island, or will they fall apart from infighting first?

[Written by MAL Rewrite]

Luffy and crew go to an island searching for a legendary sword, said to be the most expensive in the world. Soon attacking marines and beautiful maidens split the crew. Zoro betrays the crew to help an old friend, Luffy and Usopp wander through a cave, and the rest help a village fight marines. When Zoro defeats Sanji he takes the sacred pearls that are the only defense against the evil sword that will plunge the world into darkness. 

(Source: ANN)

Luffy and crew arrive at the harbour of Anabaru. The local casino is holding a competition in which the winner will obtain a huge monetary reward if he reaches the finishing line first. Nami is elated and decides to participate in the competition. However, there is a conspiracy going behind the competition and the mastermind is an ex-military commander, Gasparde. His plan is to lure all the pirates to the military base and send them to their deaths. Luffy and gang have to overcome the numerous tests and tribulations along the way to complete this dead-end adventure.

(Source: ANN)