Yesterday 9 is a tale of a one-sided love story, followed by separation and re-alignment. It talks about the difference between true love and a non-introspecting baseless love. A story of disruption of love between a couple and the ghostly way it comes back as an empowered black spirit. As love time-travels to attain back what is lost, the black spirit's horryfying effect slows down every action taken in the past to secure the future. With mighty twists and turns, the book is packed with various emotions to set the stage for adventure. Will the couple reunite in love or will time-travelling tear them apart?