A traveling Porg missionary fights despair and rejection as he searches for brothers to join him in his faith. An artifact of his proselytization lies dormant for years, but upon rediscovery sparks an enlightening discussion between a contrasting pair of bookshop owners.

Set mostly on Artacuse and beginning in Embarnik 4, Door to Door touches on the trials of spreading a religion and compares the religious history of the Porg fringe religion Montarism with Lhytanism, the spiritual foundation of all modern Kaean civilization. The visual artwork for this story was created by Joe Slucher, and the story was written by Eric Carter and Jason Bane.