The markings on Dororo’s back, which are only visible when his skin is warm (and he’s never had a warm bath before) form half of the map to his father’s “ambition”—a hoard of stolen samurai gold meant to finance a peasant uprising.
In the event of his death, his wife insisted he engrave half of the map upon her so that she’d never be tempted to draw from it, not even to feed herself or Dororo (these guys were zealots to the last). The other half is on Dororo’s back, though his memory of what was on his mom’s can’t be that clear.
And so while Hyakkimaru is cursed with missing limbs he must fight to get back from demons, Dororo is cursed with the legacy of two parents who could have given him a much better life had they had swallowed their honor pride for his sake.
He also now has a choice of what to do next: find the gold and use it as his folks intended, or use it to life a comfortable life. Biwamaru lays out the choices Dororo has, but he’s not leaving Hyakkimaru’s side, and Hyakkimaru is focused on the here and now and the remaining demons.
Hyakkimaru ignores Dororo’s questions about “what comes next”, and is “saved by the bell” in the form of the approach of two bizarre monsters: an emaciated woman and a giant, demanding baby who grabs Dororo. Hyakki takes no action since they’re “not demons,” and they eventually come upon the ruins of a temple that was apparently burned down intentionally (judging from all the oil).
The big baby vanishes before a well-dressed man with a very odd stare appears: he introduces himself as Sabame, lord of a village and its surrounding lands. Dororo doesn’t exactly trust those weird eyes, but he’s not turning down the offer of a meal and a roof over his head, now is he?
And what a meal and roof! The pair probably enjoy the most sumptuous meal they’ve ever been served, and they eat in front of a traditional band and synchronized dancers. Lord Sabame, who claims to have never left his own domain, is always eager to hear the stories of travelers, and so is more than happy to give them food and room to stay in exchange.
Sabame begins with the tale of an evil nun who abused, enslaved, and sold off orphans. She was killed when the heavens apparently “saw enough” and burned the temple down with lightning. Neither Dororo nor Hyakki quite believe this story, since they saw evidence of arson.
That night, with a huge room all to themselves, Dororo blames the “draftiness” of the house, and not fear, for his adjusting his futon so he sleeps closer to Hyakkimaru (who sleeps with his eyes open). Then a giant caterpillar with four human arms drops from the rafters, and Hyakki wakes up in a flash, blades drawn.
The caterpillar has silk that momentarily immobilizes Hyakkimaru, but he’s able to do enough damage to force the monster to flee, which it does with the help of a giant, poison mist-spewing moth. Dororo and Hyakki prepare wash themselves off in a nearby bath.
Then we check in with Lord Sabame, who has not only not turned in for the night, but is actually facilitating the moth demon, who takes the form of a woman. The “travelers” Sabame hosts apparently become food for the moth’s children, the survival of whom Sabame places the utmost importance.
While Sabame’s methods are fundamentally immoral, he has made the choice to value the moth and its offspring above the lives of innocent guests, just as Dororo’s parents chose to keep the grand cause alive over their only child’s well-being. Just as Hyakkimaru’s victories will continue to threaten Daigo’s lands and his people, how they chose to deal with Sabame could also have larger-scale consequences. For an imperfect world is full of fragile, imperfect solutions.