Corpse Party: Blood Covered revolves around a group of students from Kisaragi Academy and one of their teachers. They try a mystical charm called Sachiko Ever After as an attempt to cheer up one of their classmates who is going to transfer schools, but something goes wrong, and they end up trapped in Tenjin Elementary School. What's even worse: they appear in completely different dimensions inside the school.
While searching around the school, they find the corpses of the people who were trapped before them, along with the spirits of four children who are not willing to let them live. The students of Kisaragi Academy must unravel the mystery behind Heavenly Host and escape from there.