Kang Tae Ju, a former neurosurgeon who now serves as a hospital director struggling to face a dangerous criminal in order to save his wife, who was kidnapped before their divorce.

Separated as children and unaware they're siblings, a brother and sister struggle to reunite, reclaim their birthright, and save the world.

1910s, Japan. A town with mysterious black snow. Kodo Iwamoto, a student at a military school dedicated to studying the paranormal, is sent to investigate. There, he meets a boy who believes he's sick, but Kodo recognizes the illness as something else: supernatural abilities. Kodo recruits the boy to the school and sets off across the country, chasing mysteries and searching for others like him.