Pen Singam (English: Lioness) is a 2010 Tamil film directed by Bali Srirangam. The film, based on M. Karunanidhi's novel Surulimalai, stars Meera Jasmine, Uday Kiran, Richard, Vivek, Rohini, Radha Ravi, Rambha and J. K. Rithesh. The film released on 3 June 2010, coinciding with chief minister Karunanidhi's 87th birthday.
A young man named Surya is friends with a man named Nagendran. Surya runs into a problem with Simha Perumal and the gang. Nagendran made a speech about a woman way of getting married off with no dowry, a woman way of getting married is education. So Mythilli falls for Nagendran.Mythilli is a rich woman of an inherited father. Surya and his mother helps Nagendran get married. On the first night of Nagendran and Mythilli, Nagendran demands Mythilli to give him money. Mythilli is shocked to find out that he is not the man of her dreams. Mythilli made a cheque but cancelled the cheque, so Nagendran blackmails Mythilli using the pictures. Surya is shocked that Nagendran is a bad friend all his life. Nagendran invites Simha and his gang for a drinking party. So Mythilli called Surya to stop him. There Nagendran and Mythilli started to fight.In the meanwhile Simha's gang shut down the power and Mythilli was on the floor shot in the head, and in Surya's hand there was a gun.Surya was confused how did the gun get in his hand. Surya is accused of shooting Mythilli. Meghala is on the case of Mythilli's death. What is Surya's fate like after?
The film was launched in 2008 under the title "Neeyindri Naanillai" with Ilavenil of Uliyin Osai being announced as director. In a sudden turn of events, Ilavenil was replaced by a newcomer Bali Srirangam and the film had undergone a change of title with the makers naming it as "Pen Singam". In this film, Meera Jasmine dons the role of an IPS officer for the first time in her career. The film is about women's fight for justice. Uday Kiran plays the male lead role in the film. Karthika is doing a prominent role in the film, as a Police Officer. Actor Richard is playing the role of an IFS officer in the film. Yesteryear actress Rohini is playing the role of a Judge and Vivek will provide comedy sequences.
Behindwoods rated the film 1 out of 5 and mentioned "Overall, Pen Singam has got a pretty neat script, which holds one’s attention, but lacks in contemporary value. A couple of holes in the script, a weak and meaningless comedy track and lackluster music come in the way of the Pen Singam’s roar". Rediff noted "Technically, the film manages to scrape through; it's the script that stumbles and almost grinds to a halt frequently, while the cast itself looks clueless and plain out of it, at times. Logic has gone for a toss as well and of reason, there's very little".