While You Were Sleeping

Can tragedies be avoided if they can be foreseen? In life, we witness small and big events. What would happen if someone can foresee every single event? A woman, played by Suzy, can see accidents that take place in the future through her dreams. A prosecutor, played by Lee Jong Suk, struggles and does everything he can to stop those dreams from becoming real. Will they be able to save our world from tragedies?