From the front of the book:
The defeat of Arbosus left many unanswered questions, stirring fears of sinister intentions that the Companion’s light has not yet illuminated. Can you defeat the hidden threat at the Boareskyr Bridge or will you be the first to suffer a fate that could forever blight the paladins’ pride? A Living Forgotten Realms adventure set in Elturgard for characters of the Heroic tier (levels 1-10). This adventure is the conclusion of the Sinister Intentions Major Quest that began in ELTU3-1 Good Intentions and continued in ELTU3-3 The Way of All Flesh. We strongly recommend that you play this series in order, with the same character, if at all possible. As with all Elturgard adventures, there may be additional role-playing possibilities for PCs who are members of the various Elturgard meta-organizations.