「おさらばです。名探偵さん………」

欧州の各地に犯罪網を巡らす巨大組織。
その首魁に懸けられた賞金を目当てに接触してきた、ごく平凡な貿易商を名乗る男と共に、探偵は各地を巡る。

その末に探り当てた黒幕と思われる人物は、よく見知った顔だった。
男が消えた断崖に立ち、探偵は呟く。

「ふざけるな………
　地獄へ逃げるのならば地獄へと赴くまで。
　幕を引くのは！　探偵（オレ）の仕事だ！」
「乗り掛かった船だ。
　俺も最後まで付き合うぜ」

―――これは、探偵としての最後の事件。

"Farewell, great detective..."

A great crime syndicate whose tendrils extend all across Europe. The detective travels far and wide in search of its leader, accompanied by a man claiming to be a completely ordinary merchant who only wants the bounty on the leader's head.

When the supposed mastermind is finally found, he turns out to be a man they both know well. As the detective stands on the cliff where the man disappeared, he mutters to himself, "This isn't over... I'll chase you 'round perdition's flames before I give you up. It's my job as detective to close this case once and for all!"

"I've come this far. I'll stick with you until the very end, too!"

...This will be his last case.