Iofiel is an ideal candidate to become a guardian angel, and help steer humans away from sin: she's helpful, cheery, and utterly loyal. And, as the 'angel of beauty', it's not like she has anything better to do. Heaven and Hell long ago ran out of space: there's too many humans these days, so both have come to a shaky truce – one school sheltered in the forests of Canada, hidden from humanity, where their young can study. All seems well for Iofiel's first days at university – her Archangel roommate is a bit uptight, and dealing with demons feels weird– but when a picked on demon confesses he's too nervous to pursue his true passion of soul stealing... Iofiel promises she'll major in it with him! So much for being a proper angel. Her helpful impulse has repercussions that shake the school, and may just change the world forever. Or just end it. Because that's a possibility too.

Ace charaters