Manaivi Oru Manickam (Tamil: மனைவி ஒரு மாணிக்கம்) is a 1990 Indian Tamil film, directed by Chozharaajan and produced by N. Ramasamy. The film stars Arjun, Mukesh, Radha and S. S. Chandran in lead roles. The film had musical score by Shankar Ganesh.
VK lives with his elder brother (Nagesh), sister-in-law (Srividya), and their little daughter. He spends his time idly he is scolded by his brother so VK becomes a coolie and transports articles . He is jailed for smuggling . His brother gets into accident at work at the mill and loses his arms. He loses his job and needs money for treatment. VK is released. VK begs his brother's boss (Radharavi), but he refuses. VK breaks into the boss' safe to get the money but it's too late as the brother dies.
Ponnappan (Radha Ravi), Uzhagappan (S. S. Chandran) and Azhagappan (Venniradai Moorthy) are three naive villagers who come to Chennai for becoming wealthy. However, they are cheated by the townsfolk. They decide to join hands and they begin to look for an intelligent, bachelor and good partner. The first one who comes to their mind is the lord Ganapathi. They then sign a contract with the lord (statue) : in five years time, Ganapathi will have the quarter of their benefit. The Gurukkal is the witness of this deal. To help them, Ganapathi himself appears as a human (Visu) and he becomes their partner. Five years later, Ponnappan, Uzhagappan and Azhagappan become wealthy and arrogant men. One day, the Gurukkal asks them the quarter of their benefit as promised to build a temple but Ponnappan, Uzhagappan and Azhagappan refuse it categorically. Ganapathi is shocked for being betrayed and decides to teach them a lesson.
Alexander (Arjun) is a henchman who works for the smuggler Peter (Tiger Prabhakar) and Alexander is considered by Peter as his faithful henchman. Peter often confronts his enemy Ayyanar (Radha Ravi). Ayyanar forces the innocent Anu (Kushboo) to dance in stage and he ill-treats her. Peter orders Alexander to kill the Ayyanar's weak point Anu. Alexander cannot kill her and finally shoots on her shoulder. Wounded, Anu is admitted to hospital. Then, Alexander decides to save her from Peter and Ayyanar.