JAKEYHOON_1009
After the youngest sibling, Sunghoon, leaves for college, Serin's family begins experiencing strange and terrifying events. Serin, her older twin brother Sehun, and their middle sister Shuhua all feel as though an unseen presence-an Enigma-is watching their every move. But miles away on campus, Sunghoon starts experiencing the exact same feeling. He hears whispers in empty hallways, catches glimpses of a shadow that disappears when he turns around, and realizes the Enigma isn't haunting just one house-it has followed their entire family.
As the siblings search for answers, they meet Kai, a mysterious immortal with abilities beyond human understanding. He knows what the Enigma is, but every answer he gives only raises more questions. Together, they must uncover why their family has been chosen before the Enigma claims them one by one.