The Crimson Ring may very well be a smuggling society operating in Thestra. It is known that Rastus Willem was suspected of having links to the organization. There's some indication that they may have been smuggling something that triggered the Undead Invasion, and that Dorrin Longreat of the Sages Arcane was involved.
The World of Telon › Societies of Telon
Crimson Ring
Original page: http://thetelonproject.wikidot.com/crimson-ring