S02E22: Lupin in Paradise

Lupin and Jigen hear of an amazing treasure in a remote area, and go after it. Upon saving a woman being attacked by ruffians, the place she leads them to, by way of thanks, is a paradise on earth, with good-looking women everywhere. Lupin accepts the thanks, completely forgetting about the treasure. The fact is, this mansion full of women is for the purpose of seducing men, and then exposing them to an aging gas. Is there a way for Lupin, now completely turned old, to recover?