Jai is an aspiring director who is struggling for a breakthrough. He is constantly seen trying his best to convince various producers to give his story a chance. In one such situation, he successfully gets to narrate his script to a producer, who is impressed by his talent but tells him that he (producer) is looking for a horror script and encourages Jai to write up a story in that genre. As he doesn't want to let go of this opportunity, he tries to cook up a story to no vain.
In the meantime, he comes across a facebook post which talks about an haunted house in Ooty. Intrigued and out of desperation for an inspiration for a story line, Jai decides to personally check it out. He lets his wife Anjali, assistant director Yogi Babu, and his nephew to tag along with him. They rent a temporary house next to the haunted one, and Jai immediately starts to snoop around for reasons to why people fear the abandon building.
A few days later, Jai, Yogi Babu and Anjali begin to experience supernatural occurrences around them and they decide to vacate the house. In this situation, Jai's nephew gets possessed by Baby Monica, whom he claims as his friend before, and addresses Jai as his father and questions about his mother, Janani Iyer's whereabouts. The rest of the plot revolves around the mysterious flashback portion of Jai and Janani Iyer, and finding out the real reason behind what's haunting the house.
Jai has delivered a natural performance, and has pulled of his three distinctive roles really well. Especially, his character as a clown is impressive. Both, Anjali and Janani Iyer have done a decent job with equally trying to scare and capture the hearts of the audience with their eerie and homely appearance. Yogi Babu's scores as an comedian, and is humour track is on point and he is able to easily elicit a laugh within the closed room.
Debutant Sinish has done a pretty decent job at the direction department. Though the movie is predictable and has all the cliched factors in it, his attempt at making a horror comedy film hasn't entirely backfired at him. Apart from the predictable screenplay, loose ends, seen that and bored of it scenes, Sinish's direction and comedy clicks well with the audience.
This is the first time, Yuvan Shankar Raja has provided the tunes for a horror genre and his background scores are in sync with the film's progression and gives the necessary thrills at the right time. R Saravanan's cinematography skills come to the fore and he has shot well.
In short, Balloon, is a pass time horror flick.