Mahesh Babu works at the Intelligence Bureau as a junior level officer, using that status he illegally builds his own tracking software devices and taps into other peoples' conversations, so that he could help them inf they get caught up in a crisis situation. He does this job wholeheartedly, but hates popularity, so he does this service as secretly as possible. Meanwhile, he gets to know Rakul Preet Singh by eavesdropping into her conversations and forms an infatuation with her cutesy way of talking and decides to pursue her further.
On one such day, he taps into a women who will be expressing her fear of staying alone, and suddenly everything goes haywire the next moment. Worried, Mahesh immediately sends a police constable to her place to save her. But, later on he gets to know that both the constable and the girl is dead. He takes this up as his case and tries to find the killer, which is later revealed, that it is Bharath's doing. On the course of tracking him down, he finds out that Bharath's brother, SJ Suryah is the main mastermind behind the murder, and that he is also a complete psychopath who suffers from Sadistic Personality Disorder. The rest of the plot revolves around Mahesh trying to stop SJ Suryah from causing destruction.
Mahesh Babu, the prince of Tollywood, has successfully made his deubt into Tamil film industry with this film. He paved his way into audiences' hearts through his down to earth acting and charming smile. He is the perfect definition of a director's actor. As this is a bilingual film, his lip-sync and dubbing are on-point. Though he has performed well, SJ Suryah steals all the credits and glory away. In recent times, SJ Suryah has proved that he can act really well, but he completely blew the minds of the viewers' with his on-screen performance, as the ultimate psychopath baddie. His acting is definitely one of the major advantages for the film's success. Rakul Preet Singh has very little to perform other than being the hero's love interest.
Director AR Murugadoss has delivered a gripping first half but has gone all out with the second half and almost mucked up the entire movie. The screenplay after interval lacks a lot of logic, and instead of making a nail biting spy thriller, he has made a masala thriller movie. And as he is deemed as a successful director he should stop using heroines as just a past-time and focus on giving them an actual role to play. However this film will be completely loved by the Telugu audience, while the Tamil viewers will face some difficulties with appreciating most of the action sequences and many loose ends.
Harris Jayaraj has handled the music department and his scores could have been much better, especially with the background music. Ace Santhosh Sivan cranks the camera and has made the movie very colourful, and is definitely a huge advantage for the film.
In short, Spyder, has no venom in it.