保险公司CEO叶瑾（郑秀文 饰），是众人心中不怒而威的霸道女总裁，对爱情感到绝望的她认为只有对孩子的感情才是永恒的，于是决定借精生子。在严格的层层筛选后，帅气不羁的快递员肖博（张孝全 饰）意外成为孩子父亲的最终人选。有苦难言的肖博，义无反顾地签订了“变态”合约。而此时故事才刚刚开始…A strict female CEO of an insurance company has already given up on love and believes that only the love towards a child is true and eternal. Thus, she decides to have her own child so she "borrows" sperm from a delivery man whom she hired, but things start to get out of hand when the two starts to fall in love with each other.