Eeraa is Thriller story. There has not been much of contreate evidence existing today to prove the existance of ghosts and spirits. Nakulan Ponnusamy (aka) Nakul, a paranormal investigator, goes in search of such evidance. Believed to be haunted, the unoccupied house of a leading Industrialist in Munnar was chosen to be a subject of study by Nakul.

After a complete night's stay for his primal investigations, Nakul was found dead under mysterious circumstances. The name Daisy, a TV reporter forms the rest of the story. The public on spirits and ghosts has been analyzed.