From the first page of the adventure:
Evil cults have menaced the residents of Tymanther on several past occasions, with threats ranging from Ruinspoke to Djerad Thymar to the Black Ash Plains. New information suggests that now is the time to strike at one particular cult’s leadership and put an end to its activities in the region once and for all. But those who supply such valuable secrets often have their own agendas. A Living Forgotten Realms adventure set in Tymanther for characters levels 14- 17 (the P2 level band, using the Year 1 / Year 2 mustering rules; see the LFR Campaign Guide for details). Characters not within the listed level range may not play this adventure. Damage expressions in this adventure have been updated to Monster Manual 3 standards.
This adventure is a loose sequel to TYMA1-3 Tools of the Trade and a direct sequel to TYMA1-6 Troubled Roads, and wraps up storylines from both those adventures. It is therefore of interest to characters who participated in TYMA1-3 and/or TYMA1-6. Play of either or both of the previous adventures is neither required nor assumed, however.