Sixteen-year-old June Bae may very well be your typical high school student, but the Rose Cross Academy is not your typical high school. Instead of history assignments and English papers, June trudges through Alchemy mixes and Demonology homework.

His sophomore year in the Dreamer program at the Rose Cross Academy is just as predictable as last year, starting off with the standard spring visits to rid the city of infestations from civilian nightmares - spring cleaning the Academy calls it. But June finds out the hard way that some nightmares do not want to be cleaned when one of those nightmares drags him into the world of demons - a world known simply as Below.