Karanveer Singh Dogra (Vidyut Jammwal) a.k.a. Karan is a commando with the Indian Army's 9 Para. During routine helicopter training their helicopter crashes on the Chinese side of the border. The lone survivor of the wreckage, Karan is captured by Chinese officials. As the crash happened on a river and wreckage of the chopper got washed away, Karan, as well as his seniors, are not able to convince the Chinese of his innocence. The Chinese feel they can use these circumstances to brand him as an Indian spy and use this political leverage to embarrass the Indian government and create an international fracas. The Indian government feels that under such politically unfavorable circumstances, the Chinese will not accept any proof of Karan having crashed during a routine training exercise so they order the Army to erase Karan's army record, identities and simply deny his existence. Due to this Karan has to suffer inhuman torture from the Chinese Army for one year in a bid to force a confession out of him.