London, 1974. As Britain plans for electric blackouts to move across the nation, trainee registered nurse Val arrives for her very first day at the falling apart East London Royal Infirmary. With the majority of the individuals and also personnel evacuated to an additional hospital, Val is compelled to function the graveyard shift, discovering herself in a dark, near empty building. Within these wall surfaces exists a harmful trick, requiring Val to deal with both her very own traumatic past and also inmost worries.