The Girl in Room 105, written by Chetan Bhagat, is a romantic thriller that intertwines themes of disappointment and romance. The story tells the story of a young man named Keshav, who is distraught after his girlfriend Zara is found murdered in her hotel room. As Keshav investigates the situation, he uncovers secrets and lies that cloud his understanding of the people he thought he knew. The novel explores themes of love, betrayal, and the search for truth.