The downworlders retaliate after Valentine's attacks. The New York institute deals with the repercussions Valentine caused. New faces immerge from the shadows to help the Shadowhunters.
Did You Know?
the title is a reference to the latin saying used in the novels, "mea culpa, mea maxima culpa" meaning "through my fault, my most grievous fault". it means one is taking responsibility for their actions. See more