From the first page of the PDF:
Cleansing the infestation beneath the boughs of Cormanthor reveals on the beginning of the corruption. Demon cultists have infiltrated Myth Drannor and the ancient land needs your help to stop their nefarious plot. Swarm of Chaos is a two-round continuous-play Living Forgotten Realms Battle Interactive set in Myth Drannor for characters levels 1-20. This adventure is combat-intensive. Players who do not enjoy combat encounters are less likely to enjoy this adventure. It is recommended that at least three of the characters be members of the same Adventuring Company. This adventure takes place after the events of the SPEC3-1 Roots of Corruption adventures, but playing the adventures in order is not required. This adventure may only be run at Wizards Play Network (WPN) Public Play events. It may not be sanctioned for Private Play.