Summary While discussing an onboard battle scenario, Na Dae-yong comes up with an idea of putting a cover on assault vessels. When Soon-shin responds seriously to this ridiculous idea Su-chang argues that the enemy would quickly set fire to the cover and sink the ship. Soon-shin encourages Na to make the cover fireproof. Somewhat jealous of Na Dae-yong's talents, Su-chang rummages through the library to find that "Turtle Ship" had existed during King Taejong's reign. He contends that putting a cover on the ship is a bad idea since the Turtle Ship failed to demonstrate its effectiveness and was abandoned after a brief period of use. The next day, Na Dae-yong enters the meeting with a strange drawing.

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