Shovel Knight: Plague of Shadows is the second campaign of Shovel Knight and a parallel story to Shovel of Hope. It stars the loony alchemist Plague Knight in his quest to craft the Ultimate Potion from the Essences of his fellow knights of the Order of No Quarter.

Plague of Shadows was released on September 17, 2015, adding with its release new related Feats, and introducing for the first time Challenge Mode for both Shovel Knight and Plague Knight.