Jayaraman is a visually-challenged man, who works as a lift operator in an apartment in the city. He is has a special ability to sense even the slightest sounds, smell, and touch.
One day, he witnesses a murder which happens in the apartment, but the real killer escapes and Jayaraman gets arrested on the basis of circumstantial evidences. How he proves his innocence forms the crux of the story.
Mohanlal, who plays Jayaraman, has delivered a brilliant performance as the visually-challenged lift operator. The actor succeeded in presenting the challenging character with perfection, and it is undoubtedly his best performance in the recent past.
Unlike the earlier Mohanlal-Priyadarshan films, the technical team of the movie consists mostly newcomers. Director Priyadarshan had recently stated that Oppam is one of his best works till date.