Hollow Winds, the second book in the Nocturnum campaign trilogy, picks up where Long Shades left off. The book contains an in-depth examination of the campaign's new threat and its apocalyptic plans for the Earth. The book details the various factions and conspiracies involved in the Nocturnum campaign and four adventures: Flight 714 -- While flying home from California, the investigators run afoul of on board cultists with murderous intentions. Visiting Hours -- At the request of a mysterious benefactor, the investigators visit a mental hospital looking for answers, but find only danger. A Family Affair -- Bower County, Georgia is a quiet town with dark and twisted past. Now its children are disappearing, and it's up to the investigators to find out why. Thor's Anvil -- In the frozen expanse of the Atlantic there lies an oil platform with a terrible secret... and a terrible fate.