Arulnithi, who's a loner finds solace and comfort in actor Vivek's comedy. That said, Arulnithi gets an opportunity to meet Vivek one day, who comes to Ooty to spend time with his close friend Subbu Panchu since these are his last days. During his stay there, Vivek one day decides to go out for a while when his car gets stuck in a pit. This is when Arulnithi arrives at the spot and assists him getting his car out. A friendship soon blossoms between them and it is then when Arulnithi reveals he is a huge fan of Vivek. Soon, he introduces him to Tanya and they all meet often thereafter.
Despite being friends, Tanya is secretly in love with Arulnithi and it is Vivek who encourages her to express her feelings. Tanya too musters up the courage and reveals her feelings to Arulnithi, who gives her a reality check saying her parents would never accept him since he is a deaf-mute and storms off angry. Meanwhile, it is revealed that Arulnithi can indeed talk and that his ability to speak had come back when he was a kid. Hearing the news, both Tanya and Senthil get extremely upset over his actions and refrain with talking to him from that point on. Later, Vivek advises Arulnithi to break the news to everyone that he can talk and as expected people close to him get upset for hiding the fact. The rest of the plot of Brindhaavanam revolves around why Arulnithi chose to keep his ability to speak a secret, why he leads such a mysterious life, whether he and Tanya get together.
Arulnithi has delivered a top-notch performance as a deaf-mute person and he has no doubt worked hard for getting the nuances on point. We feel happy when we see him enjoying his life without a care in the world. There will be comparisons to his performance with Jyothika's role in Mozhi. However, he stands apart on his own and a comparison between the two would not do justice to their hard work. Vivek comes in the film as an actor and this is one of his best roles in years. It is well known that he can balance playing sentimental roles and this one tops the list. And, as usual, his comedy is gold. The bond he shares with Arulnithi is the kind of good friendship we all would want in our lives. Tanya's role is bold and she has lived that character. Her dialogue delivery is good and she shows promise for a bright acting future. Senthil comes in as his friend and does his role justice. Veteran actor M. S. Baskar has been consistent over the years playing roles with substance and he does it again. Some of the dialogues he speaks might be simple, but are deep in meaning.
At a time when films with flimsy content are being made, director Radhamohan stands out of the pack making ventures that are like soft flowers that brush past our faces. He has once again made a film that showcases love, affection, friendship, family values and powers his way through the dialogues written. Producers must come forward on their own and lend support and encouragement to such filmmakers. M. S. Vivek's cinematography skills come to the fore and his visuals in the film are outright fantastic while Vishal Chandrasekhar's songs as well background score give immense strength.
In short, Brindhaavanam is beautiful.