Parthen Rasithen is a 2000 Indian Tamil-language romantic thriller film written and directed by Saran. The film stars Prashanth, Simran and Laila, while Raghuvaran, Jai Ganesh, Vinu Chakravarthy, Vaiyapuri, Charle, Dhamu, Lawrence Raghavendra, Fathima Babu and Jyothi play supporting roles. It narrates Shankar's love story with Sarika, but problems and misunderstandings plague their romance. Bhanu, Shankar's best friend, also falls in love with him, and schemes to get Shankar to fall in love with her and break his love with Sarika.

Plot

Shankar is a graduate of BSC nautical science waiting for a job in the shipping industry. He is a tenant in the house of Bhanu, a medicine student, who is also his good friend and confidante. They spend almost all their time together, and she seeks him out as a refuge due to her stepbrother Panneerselvam, whom she dislikes but is forced to live together with. One day, while dropping off Bhanu at a bus stop, Shankar sees a pretty girl Sarika and likes her. He tells Bhanu about Sarika, and they soon find out that Sarika is also interested, and they both eventually fall in love during their daily commute in the bus. Meanwhile, Shankar's rude and abusive father Chidhambaram lands in Chennai for his wife's heart surgery and tells Shankar that his marriage with a girl is being arranged swiftly and the same situation happens in Sarika's house simultaneously. However, both Shankar and Sarika are unaware that they themselves are the prospective suitors arranged for each other by the parents and thus avoid the formal meeting ceremony. Chidhambaram gets irritated and creates a ruckus at Sarika's house and after a huge argument, both the parents cancel the marriage arrangements.