简(艾什莉·贾德 Ashley Judd 饰)是一个成功的脱口秀栏目制片人,在事业蒸蒸日上的同时,甜蜜的爱情也不期而至。刚刚上任,制片主任雷(格雷戈·金尼尔 Greg Kinnear 饰)就对简发起了猛烈的甜蜜攻势。而正当两人打得火热准备同居的时候,雷的态度突然发生了奇怪的转变,在日益冷淡的感情面前,简选择了离开。 在痛苦中,简开始思考起雷奇怪的转变,她发现,在对待感情这码子事上,男人和动物有着异曲同工之处,她决心进行深入的研究。由于推掉了房子,简和同事简好友埃迪(休·杰克曼 Hugh Jackman 饰)住到了一起,同时,埃迪也成为了简的研究对象。简凭借着自己的研究成果开辟了一个匿名专栏,引起了强烈的社会反响,而她和埃迪之间的关系也渐渐变得奇妙起来。Jane Goodale has everything going for her. She's a producer of a popular daytime talk show, and is in a hot romance with the show's dashing executive producer Ray. When Ray unexpectedly dumps her, she begins an extensive study of male behavior to try to find out what makes men tick. Her "research" leads her to become an overnight sensation/guru for single women everywhere. When Jane begins to use her womanizing roommate and co-worker Eddie as fodder for her research, she finds both humor and answers where they were least expected.