When twenty two years or so aged Evalla felt too much for Viswanadh who was not only a widower, has a twenty six years or so aged daughter but also aged more than double to her; and wanted to live with him, she did not know the reason why. She was so happy a girl after her marriage with Viswanadh except with the only one problem ‘Okatho’ in her. For a long time, she was also just like Dr.Rose, of the opinion that it was just her ‘split personality’. But when she remembered her past, when she remembered the promise she made to her sister Okatho while she was dying, she understood it was not the split personality in her but her natural sister Okatho herself. Her remembering her past cleared all of her doubts which included why she has attracted that much to Viswanadh and wanted to live along with him. How Dr.Rose, a psychiatrist in her own way and Sadan, a para-psychologist in his way tried to solve the problem of Evalla is the story of the book ‘Split Personality’, a maga psychological and paranormal thriller