Saurabh (Keshav's friend) bids Keshav to forget his past love and focus on his future. Keshav often calls Zara begging her to come back to him, but she never agrees. Raghu happens to be an intelligent person with a geeky look. Keshav couldn't come out of it and keeps remembering Zara, who then loves Raghu (Keshav's classmate). Zara is from a Kashmiri Muslim family and their love story ends due to their families, who fight over religious issues. He has a love story with a colleague named Zara Lone, who is pursuing her Ph.D. His mother is a homemaker and his father is a part of the RSS. He hates his job and reaches out through LinkedIn, but fails to find a proper job. Keshav is a former IIT student who currently works as a teacher in a JEE tuition center. Soon after, the fellow passenger starts narrating his story to the author. After an initial conversation, Chetan agrees to listen to the story of the fellow passenger.

The novel opens up with a conversation of the author of the book, Chetan Bhagat with a fellow passenger on a midnight IndiGo flight from Hyderabad to Delhi. The book also addresses the stereotypes and political issues in India. The rest of the story is his journey where he stands by his ex-girlfriend after her death to find justice. It tells about an IIT coaching class tutor who goes to wish his ex-girlfriend on her birthday and finds her murdered. The book became a bestseller based on prearranged sales alone. The Girl in Room 105 is the eighth novel and the tenth book overall written by the Indian author Chetan Bhagat.

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