Thaiyal Nayagi, a journalist from Chennai, happens to connect with a terrorist in Tunisia through a fake account in the name of her 16-year-old cousin, Sushmitha. Little she knew that this would put herself and her cousin in danger.

Neerja is a portrayal on the life of the courageous Neerja Bhanot, who sacrificed her life while protecting the lives of 359 passengers on the Pan Am flight 73 in 1986. The flight was hijacked by a terrorist organization.