When renowned botanist Dr. Rosa Marquez receives a strange monster from the remote and mysterious Hemlock Isle, her instincts tell her something is wrong. On the recommendation of an old colleague, she invites the researchers to accompany her on an exploration of the island. Nothing could prepare them for what they find: deadly, mutated flora and fauna and a strange, malevolent presence permeate the island, as the locals prepare for a festival, seemingly unaware of the danger. The researchers have only three days to discover what lies beneath Hemlock Vale before its residents meet a terrible fate.

In the Campaign Expansion "The Feast of Hemlock Vale," one to four explorers travel to Hemlock Isle, an island shrouded in mystery that has only recently become accessible to visitors. During the day, players will bond with locals and explore the island, but once the sun sets, the island turns into a death trap of hungry, distorted flora and fauna. Can they uncover the secrets of Hemlock Isle in just three short days? Or will they be devoured in the approaching feast?

This expansion contains the complete "The Feast of Hemlock Vale" campaign. Players only need a copy of the Arkham Horror: The Card Game Revised Core Set to dive into the story.