The True Nature of the Treasure's Location: The treasure map does not lead to a buried chest on an ordinary tropical island, but to the perilous Island of Thunder and Lightning (Beon-gae-seom), surrounded by deadly vortexes, volcanic vents, and continuous electrical strikes.
Moo-chi’s Past Unveiled: Moo-chi reveals his past identity as a decorated military general under Goryeo who was betrayed by Bu Heung-soo. Their final duel is a personal reckoning of honor, avenging murdered soldiers from Moo-chi's past.
Mak-yi's Accidental Heroism & Penguin Army: After being separated and stranded on an island with aggressive local penguins, Mak-yi inadvertently discovers the crucial clue to the treasure’s whereabouts and arrives during the final confrontation, providing chaotic but vital support.
The Climactic Naval Battle & Volcanic Cataclysm: In the eye of the sea storm, Hae-rang and Moo-chi lead their combined forces to defeat Bu Heung-soo’s armada. As the volcanic cavern collapses and gold cascades into the sea, Moo-chi defeats Heung-soo, choosing to save Hae-rang and the crew rather than chase every piece of sinking gold.
The Ending Resolution: Having secured a massive fortune in imperial gold, Hae-rang and Moo-chi distribute the wealth equitably among all bandits and pirates. Rather than submitting to the newly established Joseon kingdom, they set sail toward uncharted waters as equal co-captains and romantic partners, flying the Goblin Flag as free rulers of the open sea.