Revenge stories with a woman as a protagonist usually end up being soft porn films with the woman using her body as a weapon, being used as an excuse for titillating scenes. Prathi...'s director avoids this route and comes up with a good scheme by means of which the wronged woman has her revenge. But inspite of that, his reliance on vulgarity and sleaze in the first half and the uncharismatic, underperforming cast make it difficult to recommend the film.

Suresh(Suresh), Ramasamy(Karunas), Seetharaman and Murugan are college students who, like college students in most Tamil movies, while away their time drinking and having fun. The title of the film refers to the time of the week(Sunday 9 to 10:30) when they, under the guise of doing group study, hire a prostitute and have fun. Kalyani, who is attending an interview in the same hotel that the four guys are holed up in waiting for a prostitute, knocks on their door by mistake and the friends, not listening to her pleas, rape her. Kalyani then comes up with her own plan for revenge.

Considering the history of portrayals of college environments in Tamil cinema, it comes as no surprise that scenes where the four friends attend college meet those same low standards here too. They drink, bunk classes and make fun of professors(yes, 'Venniraadai' Moorthy is one of them!) and are shown doing everything except studying. Unfortunately, the scenes outside college fare worse. Under the pretext of showcasing them as youngsters with only sex on their minds, the director resorts to double entendre dialogs and shabbily picturized item numbers.

The sad part is that these portions are not entirely unwatchable. There are some witty one-liners scattered around that raise some chuckles even if they are uttered under cliched situations(teasing the professor in college, lying to the dad to borrow some money, etc.). Some sequences(like the Anniyan take-off) are actually funny and the director shows some cleverness in the way he intercuts the scenes where the four boys are talking to their dads. Too bad that these bright spots are completely buried under the barrage of vulgarity.

It is never clear how Kalyani manages to implement the first step needed to put her plan in motion. But once we get past that, her plan grabs our interest. The psychological aspect of her plan is new and adds a unique and interesting dimension to the otherwise familiar revenge story. The way she taunts and gets under the skin of one of the four guys is fun to watch and some of the sequences are well-picturized.

But even after the plan is put in motion, it takes a while to get up to speed. The build-ups to some of the scenes feel unnecessarily stretched and end up being irritating when they end up as anti-climactic. The policemen are not made complete clowns and do conduct a good investigation. But the comic touch is unnecessary and takes the edge off what should have been a thrilling investigation.

Barring Karunas, the other three friends are played by new faces and they are not talented enough to make the movie rise above its shortcomings. They have rather inexpressive faces and while this doesn't matter during the first half, it affects the impact of many sequences in the second half. Karunas is ineffective when he tries comedy but does better in the second half. Kalyani, another new face, does a better job than the debutant actors and makes us cheer for her as she extracts her revenge in a cunning fashion.