The action is set in Ooty and after a careless leak of bio waste, a virus starts spreading, with a dog being the first link in a long endless chain. Humans start turning zombies (blood thirsty animals looking to bite every other creature that comes their way). Jayam Ravi plays a traffic cop whose world revolves around his young sister (played by Anikha of Yennai Arindhaal fame) and Lakshmi Menon is a dutiful doctor. Both Ravi and Lakshmi have key parts to play in order to prevent the virus from totally wiping (biting!) out the human race in Ooty and Coimbatore.
Miruthan follows a pretty one-dimensional screenplay structure and Jayam Ravi is mostly seen shooting down zombies as the one-man demolition force. Towards the end, there is a barbaric turn in his character and Ravi aces the part, with his sincere portrayal. Miruthan may be another commercial success for the dedicated and handsome 'Ilam Puyal'. Lakshmi Menon and her team of doctors have to somehow find an antidote to this virus and Ravi has to transport them safely to Coimbatore amid all the carnage.
Director Shakti has tried to infuse elements like comedy, romance and sentiment into his bloody core premise. The comedy parts arise from Kaali Venkat (as Ravi's police colleague), RNR Manohar (as a proud politician) and Sreeman (as a scared security agent). All these characters travel along with the main story, and there is some good fun in parts.
Anikha is a very talented child actor and she does well yet again. Her role holds key significance towards the end. The sister sentiment works well when things turn emotional, but it is hard to accept Ravi and Anikha as a brother - sister duo, given their obvious age difference.
The love track is not convincing, even though two good songs have been used to add to the romantic equation between the lead pair. 'Mirutha Mirutha' in particular is a poetic segment in the film's frenetic climax, when the shootout action reaches a crescendo.
The film's technical crew, comprising the make-up department, the VFX team and the stunt team, are the unsung heroes. Massive work has been done in all these areas and these technicians deserve a salute for delivering quality work in the given budget. The producers have to be appreciated too, for being game enough to invest in this first-time attempt in Tamil cinema. The visual output is sleek and there are hardly a few tacky moments.
Imman's re-recording adds on to the drama and fear factor and it is mostly a loud pulsating score. There is some variety in Imman's background scores even within this space. The songs and themes are quite popular already and will ring in your ears. The camerawork complements the dark, moody premise of the film, and there are many drone shots used in the earlier part of the film to hint at the impending catastrophe.
The run time of Miruthan (just 108 mins) ensures that the film races ahead with minimum lulls or breathers. Save a lighthearted segment in the first half, when there is talk of romance in Ravi's life, the other parts totally revolve around the zombie menace. The title credits scenes are terrific and we are straightaway taken into the gory world of the zombies. The film does feature a lot of disturbing violent visuals and is not meant for kids and weak-hearted adults.
Watch out for the film's final scene which would thrill you if you had enjoyed the film. In all, Miruthan is a different attempt from director Shakti, Ravi and team. It justifies its hype to an extent, and provides some adrenaline pumping moments.