Bound by her oath to a secret covenant, Alice Margarita de Leon sets on a journey to unravel the sacred mystery of the Great Old Ones. A cult founded by worshippers of ancient cosmic entities have risen to power and casts a chilling curse upon a once beautiful land of faithful and loving people, the forsaken city of Ariames.                 

When an urban exploring trip ends up with Hyejoo, Yerim, Yeojin and Chaewon getting their hands on a mysterious book meant to be sealed away, chaos ensues after a page from the book is read. (Or, how to accidentally summon a Great Old One) 

Jongdae and his friends plan a viewing party for a rare green comet, staying up late just to witness the end of their world.