From the first page of the PDF:
The ever-shifting sands of the Calimshan desert have uncovered the ancient city of Suldolphor. The forces of Calimport, Memnon, and Almraiven converge upon the city, each striving to gain a tactical advantage in their ongoing struggle for supremacy. This adventure is a combat-intensive two-round continuous-play Living Forgotten Realms Battle Interactive for characters of the Heroic and Paragon tiers (levels 1-20, but all characters at the table must be able to play at the group’s chosen Adventure Level, and characters from different tiers may not play together). This adventure is connected to the events of SPEC4-3, SPEC4-4, CALI4-1, CALI4-2, and CALI4-3, but all these adventures may be played in any order. It is recommended, but not required, that at least three characters at the table be members of the same Adventuring Company. This adventure may only be run at Wizards Play Network (WPN) Public Play events. It is not sanctioned for Private Play.