Trouble at Virtue Post is a Fifth Edition adventure for three to seven characters of 3rd to 4th level, and is optimized for four characters with an average party level (APL) of 3. Characters who survive this adventure should earn three-quarters of the XP required to reach the 4th level.
This adventure takes place on arctic plains. This adventure assumes placement in The Dark Sea campaign setting, specifically in the area outside of Inepolis. However, it can just as easily be placed in any campaign setting that has frigid, low-lying plains.
You can also purchase this adventure on Roll20