Having a bad guy as the protagonist does allow a film to stand out from the crowd but the film still has to contain an interesting plot with characters who are believable and consistent. Rasikkum Seemaane fails completely on those counts. While the lead character carries the movie forward for some time, the weak screenplay and inconsistencies in characterization make it fall apart completely after that.

Nandhu and Arvind fought over Gayatri when they were young boys and Gayatri put an end to their fight by promising to marry whoever became a doctor. Nandhu, after losing his parents, was taken in by his father's friend, who convinced him that money is what will help him get Gayatri and turned him into a professional blackmailer. Now rich Nandhu(Srikanth) runs into Gayatri(Navya Nair) and tells her that he runs a security service. But it turns out that Gayatri had met Arvind(Arvind Akash) a couple of days before and he had indeed become a doctor.

Considering that our films are almost always headlined by 'good' heroes with no shades of gray, a protagonist painted in strong negative shades always spikes up our interest. Srikanth's nefarious activities are illustated rather amateurishly and the number of victims he snags and the ease with which he manages to get incriminating photos of them are just plain silly (though his blackmailing of the godman played by Mayilsamy feels like an eerie coincidence considering the recent scandal involving Nithyananda). Still, his profession makes him interesting enough to keep the story moving.

Love usually changes even the darkest heart in Tamil cinema. So the surprise about Srikanth's negative character increases even more on seeing his behavior with Navya since the expected redemption doesn't happen. His plans for her are suitably devious and one can sympathise with Navya for her plight. But the movie doesn't deliver on the promise and takes the safe route with a series of silly plot points after Navya moves into Srikanth's house. Srikanth's actions become increasingly dumber as his plans become sillier but more convoluted.

With a set agenda in mind, the director completely muddles up the proceedings towards the end. Characters undergo sudden transformations for no valid reasons other than the dictates of the screenplay. Their behavior becomes completely at odds with who they've been so far as one character displays feelings he never showed while another turns into a selfish, money-minded fellow suddenly. So the happenings, which are driven by these character changes, are never even remotely believable and are neither surprising nor emotional.

Srikanth slips into the negative role easily enough though he doesn't try to bring out the character's inner feelings and treats it more like a regular bad guy role. Navya has nothing much to do though she drives the story forward. Arvind Akash is fine initially but is unable to make his character's transformation convincing enough.