On a dark thunderous night the students of Wordsworth School reached country's greatest Mathematician Mr Pompey Plus's house in Travancore.At midnight Roop and her friends heard a knock on the glass window of their room.As they drew the curtains they saw a ghost calling them.All the students were petrified as well as excited to learn Mathematical puzzles from Mr Pompey. The following day they found a note written for the children WAIT AND WATCH.Roop had to take the initiative to save her friends.Did Mr Pompey have any relationship with the ghost?Do ghosts exist in reality? Read this mysterious story to find the truth.