Dr. Brain is a sci-fi thriller that follows Sewon Koh, a brilliant neuroscientist who suffers a horrific personal tragedy when his family falls victim to a mysterious accident. Desperate to uncover the truth behind what happened to his family, he begins conducting 'brain syncs' with the deceased to access their memories and piece together the clues left behind in their minds. As Sewon delves deeper into the consciousness of others, he begins to experience the memories, personalities, and traumas of the people he syncs with, blurring the lines between his own identity and theirs. The series explores themes of grief, morality, and the ethics of neurotechnology as Sewon races against time to solve the mystery while struggling to maintain his own sanity.