天才科学家瓦西（拉吉尼坎塔 Rajnikanth 饰）醉心于设计一款智能机器人，投入了大量精力和感情，仿照自己的外形，教与了机器人各种技能，带他在身边使他能够尽快的适应社会，并且命名它为“七弟”（拉吉尼坎塔 Rajnikanth 饰）。因为废寝忘食，忙于工作疏忽了女友sana（艾西瓦娅•雷 Aishwarya Rai 饰），为了哄女友开心，答应了女友让七弟陪自己期末复习的要求。一开始七弟闹出了许多笑话，但随着时间推移全能机器人七弟开始在生活的每个方面展现出自己过人的才能，和sana的相处，让他产生了人的情愫，并逐渐爱上了她。爱情的嫉妒心让瓦西和七弟的感情产生了缝隙，瓦西的老师趁机利用这一点开始怂恿七弟，在其体内插入了使七弟变成一台杀人工具的病毒芯片。源源不断的七弟机器人产生，世界陷入一片混乱。科学家瓦西和军方联手，开始了一场拯救原来那个善良的七弟的战斗。 该影片耗资约16.5亿卢比（约3500万美元），为宝莱坞史上的最贵电影。这部电影也创下了印度电影历史上的多个“第一”。

Anniyan is the story of Ramanujam "Ambi" Iyengar (Vikram), a lawyer who suffers from Multiple Personality Disorder. Ambi is an innocent and honest lawyer. If he comes across anyone not obeying the rules he files cases against them but all his efforts go in vain. His constant habit to be perfect in rules and honesty leads him to develop a Multiple Personality Disorder in which a new character in him grows as Anniyan (Vikram) and starts a website called to hear people's complaints. The new character, Anniyan, is a violent man. When he is Ambi and comes across a person who does not obey rules he makes complaints in his website. When he is Anniyan, he goes and kills them by methods used for torturing people in hell. He apparently takes the definition of these methods from the Garuda Purana.