Evidence recovered from the devastated island known as the Devil'sElbow indicates that vile dark elves have infiltrated the ruined elven city ofCelwynvian. The heroes join forces with the valorous elves of Crying Leaf in anattempt to reclaim the city from darkness. In so doing, they uncover a monstrousplot to destroy the surface world and darken the light of the sun in aworld-apocalypse that leaves the dark elves victorious upon a broken world. This installment of Pathfinder also features a gazetteer ofCelwynvian, a detailed exploration of the dark elves of Golarion, a bonusadventure set in the mysterious woodlands surrounding the elven city, andseveral new monsters native to the region.