Insia Malik, a 15-year-old girl, lives with her Gujarati Muslim family in Baroda: mother Najma, brother Guddu, paternal grandmother, and father Farookh who often beats his wife. Insia is very passionate about singing but her father is against her dream of being a singer.
She records a song wearing a niqab, so Farookh can’t find out her identity, and uploads the video on YouTube under the name of ‘Secret Superstar’ using the laptop gifted by Najma. She becomes an overnight sensation and grabs the attention of Shakti Kumar, a talented but pretentious music director based in Mumbai. He requests Insia to record a song, but she refuses as she hears a lot of negative reviews of him. Due to her poor academic grades, Farookh rips out all the strings from her guitar.
The next night, after discovering that Najma sold a valuable necklace to buy Insia’s laptop, Farookh thrashes her and tells Insia to throw out the laptop. Insia gets so angry that she snatches the laptop and drops it from the balcony where it falls and shatters on the street. Insia persuades Kumar to arrange a meeting with his ex-wife’s lawyer. The lawyer prepares papers for Najma to sign, and gives them to Insia. After fleeing from school to record a song for Kumar, she is unable to sing a certain party song. Insia tells this to Kumar who reveals that it is a remix. He tells her about the original version which was launched ten years ago. After singing the original song, her fame grows and she is nominated for the Best Female Singer.
Insia gives her mother divorce papers to sign, but her mother angrily rejects Insia’s demand that her parents divorce. Insia becomes frustrated with her mother, but later forgives her, after her grandmother reveals how Najma struggled to keep Insia alive. Farookh is offered a job in Riyadh and he makes it known to Insia that he plans to marry her off to his friend’s son. Devastated, Insia gives up her dream of singing and deletes her YouTube channel. Farookh confirms their departure on the last day of Insia’s exams.