Mandatori centers around Norman (Aeril Zafrel), a preternatural police detective with the ability to use his ‘imagination’ to visualize and subsequently solve a crime scene. Things take an odd turn, however when he discovers later on that he is unable to his ‘powers’ anymore. Time is not on his side, as the city of Banda Raya falls into a deeper abyss as more mysterious occurrences come to unfold.