‘Gangubai Kathiawadi’ is based on the real-life story of a girl named Ganga Harjivandas. She was born in Gujarat but eventually moved to Mumbai to settle with her lover. However, she was sold to a brothel for an amount of Rs.500. Ganga was destroyed by this betrayal, but her new life as Gangubai began. According to Gangubai's chapter in Zaidi's book, Gangubai was one of the most prominent names in Mumbai's largest red light district. In one of the incidents, Gangubai sought justice from one of the most powerful Mafia Dons, Karim Lala. According to the book, she was raped by one of Karim's gang members, and she appealed to him for justice. Later, Karim Lala and Gangu's relationship took a new turn when Gangu tied a rakhi around his wrist and declared him as her brother. Gangu was also treated as a sister by Karim Lala, who gave his sister the reigns of Kamathipura, making her one of Mumbai's 'Mafia Queens'. As the trailer is set to release, audiences can expect a little more insight into life of the central figure of the movie. The trailer might reveal the journey of Gangubai in bits and pieces to the audiences.