Kaliyoonjal movie portrays a brother to a disturbed sister. The sister, played by Shalini, is mentally disturbed if any thing goes against her will. She is possessive of her brother and creates a havoc when she gets angry. Enter Shobhana who marries Mammootty and Dileep, who plays Shobhana's brother and marries Shalini, and problems start up in the family.
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