Which campaign is this: "Return"

Actually, I've already seen a description of this campaign, but from now on, please do it like this:
Go to http://heroesportal.net/maps.php and enter the name of the map/campaign in the search field. And with the query http://heroesportal.net/maps.php?search=Return you can easily find the desired campaign:
Heroes of Might and Magic III: The Shadow of Death
Return
Author: Andre de Mongel
Country: Russia
E-mail: Kaerdin @ yandex.ru
Map posted on 09.12.2005

And there is also a corresponding topic here "Map Search".