Karthi is shown in the trailer as a spy who dons a disguise and manages to infiltrate into the Indian military's confiscation vault where all of the secrets of the Intelligence unit are held.

Karthi, who hasn't experimented much with prosthetic make-ups in his movies, makes the cut in every look shown in the trailer. Sardar's trailer promises razor-sharp stunt sequences, thanks to stunt choreographer Dilip Subburayan.

The film has triggered huge interest among fans as Karthi will be seen in multiple looks. Also, actress Laila's comeback in the film has garnered a huge attention for the film.