Paul Conway自己设计制造了一架会思(sī )考(kǎo )的机器人(rén ),起名“哔哔”(BB)。哔哔善(shàn )解人意讨人(rén )喜(xǐ )欢。万圣节晚上,Paul、Tom、Samantha及哔哔想利(lì )用遇节无禁(jìn )忌的机会,闯入老处女Elvira Parker小姐的前院(yuàn ),没(méi )想到她不(bú )通情理朝哔哔开枪,打得粉碎,只剩(shèng )下(xià )电脑晶片无损。不久感恩节来临(lín ),Paul邀Samantha共进晚餐(cān ),Samantha因(yīn )此被继父打落楼梯,脑部严重撞(zhuàng )伤(shāng )送医诊断(duàn ),因脑死而回天乏术。Paul得Tom相助,于Samantha脑中(zhōng )植(zhí )入哔哔电(diàn )脑微晶片,Samantha因而复活,然(rán )而完全为哔(bì )哔(bì )之思考模式,哔哔怨恨Samantha的继父和(hé )Elvira Parker小姐,展开复(fù )仇……