An accused of the murder of migrant worker's children, Veer Singh (Manav Kaul) faces the court trials. But this case takes numerous startling turns. Is it true that he is a merciless killer, or is he simply being targeted under assumption?

 Set in Lucknow, ‘Nail Polish’ revolves around DCP Sunil Sachdev (Sameer Dharmadhikari), who stumbles upon evidence of migrant worker's kids being abducted, murdered with their bodies being set to fire. This leads him to an unexpected suspect, a former Army officer Veer Singh (Manav Kaul), who worked as an undercover spy. Post-retirement, he continues to live a gentleman's life with a great reputation working as a coach in a sports academy. Siddharth Jaisingh aka Sid (Arjun Rampal), a high-profile defence lawyer agrees to fight this case as he is promised a Rajya Sabha seat consequent to his winning Veer's case. And the state hires public prosecutor Amit Kumar (Anand Tiwari) to make sure Veer is proven guilty. This leads them to the courtroom trial where the drama unfolds. And an unforeseen turn in the case proves that there is more to it than meets the eye.