From publisher blurb:
The Underworld Awakens!
Bandits and monsters are terrorizing the roadways, sahuagin prowl the fishing lanes, the cults commit human sacrifice, and all the while arrogant nobles challenge the king's authority. This is Boskari, an island nation on the western edge of the Kagari Islands, and before it can be saved its citizens must learn whether these calamities are independent of each other or led by a sinister force.
This incredible 106-page DnD 5E adventure for 1st-4th level characters is inspired by the epic mythology of Ancient Greece. Pit your heroes against the monstrous minions of the Underworld as they set forth on the Mother of Monsters Adventure Path. In this adventure, your heroes must uncover the plots of ambitious nobles, brave haunted forests, infiltrate war camps, and delve into the Underworld to face an evil thought long gone from the world.