It was the eve of the great pirate era.
That year, the Roger Pirates group was disbanded, Roger was executed, and the era of the Pirates kicked off.
That year, Ace hadn't been born yet, Luffy's father Long was still a bachelor, Bermel hadn't found Nami and Nokigao, and the old goddess Magino was just a little girl.
That year, everything has not yet begun.
A 21st-century soul traveled to a young crew member of the Roger Pirates. He didn't want to be a pirate, but he was wanted for a reward and was named a big pirate.
The story begins on the day the Roger Pirates disbanded.