Fornac, Nack, and Haite weren't a trio.
There was a fourth person!
And that was William!
Moreover, William was the leader amongst the four.
20 years ago, as they grew from teenagers into young adults, their passion cooled and they realized that going out to sea would not fulfill their dreams.
So the four pirates chose to go ashore.
At night, they quietly lowered all the small boats from the pirate ship, loaded with treasure and equipped with enough food and water for the return journey—before this, the four had already drilled holes in the bottom of the large ship to ensure they wouldn't be pursued. Moreover, William, the head chef, had drugged the food that evening.
With the ship breached and the small boats at sea, the drugged food was served.
All their pirate comrades, unaware of what was happening, met their end in the belly of fish.
Meanwhile, William, Fornac, Nack, and Haite were jubilant, imagining the wonderful life they would lead ashore.
Everything was so perfect.