李焕英因为车祸重伤，躺在病床上，正处于生死之间。贾晓玲趴在母亲李焕英身边，因悲伤过度，昏睡了过去。突然间，贾晓玲的灵魂穿越到了1981年。在那个时代，她遇到了20年前，还没有结婚的李焕英。
贾晓玲为了接近李焕英，就假扮是李焕英在省城的表妹。就这样她们这对母女，就摇身一变，成为了“姐妹”。
接下来，贾晓玲在1981年所做的一切，就是希望让这时的李焕英高兴。因为在她看来，未来生了她的李焕英，过得实在不幸福。
在贾晓玲的帮助下，李焕英的生活有了积极的变化。首先李焕英取代王琴，成为了胜利化工厂，首位拥有电视机的人;其次李焕英在厂里举办的排球比赛中，脱颖而出，获得了厂长的赏识;再有李焕英被厂长安排，与他的宝贝儿子沈光林相亲。
尽管贾晓玲明知如果李焕英与沈光林结婚，那么她就不会再出现在这个世界上。但为了让李焕英拥有一个美好的未来，她还是决定牺牲自己，成全母亲。为此，她开展了一系列撮合沈光林和李焕英的行动。
在这期间，由陈赫饰演的冷特，也开始对贾晓玲有了特殊的情感。
不过，最终贾晓玲和沈光林都没有得偿所愿。这个世界并没有因为贾晓玲的闯入，而发生颠覆性的改变。最终，李焕英还是选择了相恋三年的锅炉工贾文田。
你好李焕英英文故事梗概 扩展
One day in 2001, Jia Xiaoling, who had just been admitted to university, experienced a great ups and downs in her life. Proud to be a mother, she was deeply saddened by her mother's serious accident.
In a state of emotional breakdown, Jia Xiaoling unexpectedly returned to 1981 and met her young mother, Li Huanying. They were inseparable as girlfriends. At the same time, I also got to know a group of innocent and kind friends.
Xiaoling thought that she had come to this "vast world", and she could make her mother "do a great job" with her advanced thinking, but the result surprised Xiaoling and produced a series of ridiculous stories. Finally, Jia Xiaoling woke up in front of her mother's bed and found that everything happened because she missed her mother too much and had a dream
