Treasure Island — Vs. Petrification Kingdom

A mysterious message on the Perseus — the Kingdom of Science's first ocean-going vessel — reveals that whoever triggered the original global petrification may be located on a remote South Sea island. Senku's crew sails toward what they call Treasure Island, only to discover a sophisticated society built around a device capable of petrifying entire populations. The island's leader, Ibara, controls the petrification weapon and is willing to use it. Senku must infiltrate the island's social structure, decode the weapon's technology, and liberate the island's frozen captives without triggering a global re-petrification event.

The Perseus arc marks Dr. Stone's first major geographic expansion. The Kingdom of Science's construction of a functional ocean vessel — complete with radar, motor, and navigation instruments — demonstrates how far Senku's civilization project has progressed. But the arc's real focus is intelligence: Senku doesn't know what Treasure Island is, who controls it, or what technology awaits. The journey is scientific in the truest sense — exploration into genuine unknowns. Treasure Island proves to be a closed, stratified society built around a central power source — the petrification device. The island's inhabitants are divided into those who serve the device's power and those who are frozen by it. Ibara, the island's de facto ruler, has kept the true leader — Soyuz's father — permanently petrified while ruling in his name. This political deception creates a society fundamentally oriented around one technological artifact, demonstrating the manga's recurring argument: whoever controls the most advanced technology controls civilization. Senku's infiltration strategy requires understanding Ibara's psychology and the island's social hierarchies before deploying any technological counter-attack. Gen's social manipulation skills become central — the mentalist deceives island guards, constructs false identities for the Perseus crew, and manufactures circumstances allowing Senku to work toward deactivating the weapon. The sequence requires parallel operations: technical deconstruction of the petrification device's mechanism while social engineering buys time. The arc's climactic conflict involves Ibara discovering Senku's presence and triggering the petrification weapon to eliminate the intruders. The wave spreads outward — turning Senku's crew to stone before they can complete the counter-measure. Senku's preparation, however, has accounted for this: he has pre-positioned revival fluid and coded instructions that allow the one conscious crew member to systematically revive the others. The resolution requires trusting that the scientific method — leaving clear, repeatable instructions — works even when you yourself are incapacitated. The arc reveals a critical piece of information: the petrification device was not originally human technology. It arrived on Earth from space, implying the original global petrification event was not terrestrial in origin. This revelation reframes the entire series — the question is no longer "who among humans triggered the petrification" but "what extraterrestrial force petrified humanity and why." The scope of Senku's scientific mission expands from rebuilding civilization to understanding and confronting the mechanism behind its destruction.