Isle of Undeath: Nature Consumed (2014)

From publisher blurb:

A 3.5/Pathfinder Roleplaying Game compatible adventure for three to five PCs of Levels 3-4

A horrible curse has befallen an unfortunate village. A plague of undeath, fueled by dark magic and necromancy, emanates from the myth-shrouded isle located in the middle of a nearby lake. An unnatural blight has befallen denizen, livestock and wildlife alike, turning the living into twisted, necrotic perversions. Fearful rumors hint of an ancient evil reawakened – an evil that resides only in the recesses of nearly forgotten history and local folklore.

Rooted in the misadventures of an aging necromancer, the curse began with his failed attempt to embrace unlife and become a lich. The folly resulted in the awakening of dark entity that had remained dormant on the isle for centuries.

With the ever-growing undead threat, the villagers have become desperate for assistance. Those who have been sent to investigate have not returned, and if left unchecked, there may soon be little in which for them to return to.