Gatchaman (Gatchaman #6)

While browsing in an antique shop, Jinpei stumbles upon an ancient map. Excited by the discovery, he brings it to the rest of the Science Ninja Team, which sparks a thrilling treasure hunt. The map leads them through ancient ruins and dangerous terrains as they follow its clues... but are they able to make it out alive with the treasure intact? A civilian-clothes interlude for the Science Ninja Team in the vein of The Goonies!