From publisher blurb:
The Befouling Blade is a 5th Edition adventure for 3-7 characters of 5th-level and is optimized for four characters with an average party level (APL) of 5. This adventure sees the party entering the lair of a powerful dragon. Their quest is simple; destroy the beast.
Although she is also a mighty green dragon, Sukorth's most powerful assets are a growing network of spies, agents and assassins that she has seeded across the kingdom. Although very few people have ever met the taciturn dragon, all know of her reputation.
Sukorth has discovered the lair of another dragon, named Xerda the Hungry, and wishes to slaughter the current residence and secure the stronghold for herself. Sukorth's anonymity is her greatest treasure and so she has no intention of securing the lair herself or even with her own minions, instead she intends to hire an adventuring party instead.