Upon the Sea of Stars

From the front of book:

A power-hungry despot has seized control over the fabled earthmote Yaulazna. The Five Companies, now scattered, seek your help. How far are you prepared to travel and to what lengths will you go to confront the usurper? A two-round (eight-hour), high-flying Living Forgotten Realms adventure set in Yaulazna and seas beyond for characters level 17-20. This adventure is a loose sequel to CORE2-2 Rising of the Dark and a direct sequel to CORE2-3 High Infidelity. Play of the prior adventures is not required, but this adventure concludes a Major Quest from CORE2-3.