Inside an abandoned building in South Korea sits a white coffin, from which emerges Cadis Etrama Di Raizel "Rai"—a man of unimaginable beauty, dignity, and nobility. Awakening in this unfamiliar era, Rai must find someone he can trust: his loyal companion, Frankenstein. To start, Rai tries to fit into human society by converting his archaic attire into the immaculate blazer of the nearby Ye Ran High School. It turns out that the school's principal is his servant, Frankenstein. Having slept for the past 820 years, Rai needs Frankenstein's assistance to adjust to the present day, so Frankenstein enrolls him as a new student to help him grasp modern society and experience a normal life. However, Frankenstein's plans soon go awry, not only due to issues arising from modern society but also because of unresolved conflicts from his and his master's troubled past. With no other option, Rai must resort to using his mysterious power to protect those he holds dear.