Plus Plum 2 Again Japan

An ancient artifact which holds untold power is discovered in a small burg but no one knows how to unlock its mysteries. The mayor of the town announces a competition for the prize with the stipulation that the winner spends a month trying to decipher the artifact's secrets. When news of the contest spreads, champions from around the world descend on the town to get a chance at ferreting out the artifact's power. Twelve adventurers in particular have plans for the mysterious artifact...