11岁的钟丹尼喜欢画画胜过一切——当然也包括数学，在他父亲和其他人看来，数学“应该”是他的长项。他还喜欢有自己的房间，这样他可以安静地画画。所以，当他被承诺的惊喜原来是他满脸皱纹，还得过数学**的中国奶奶时，他的生活被颠覆了。更糟糕的是，奶奶不得不和他同住一个房间，而且她还睡上铺！

奶奶一句英语都不会说，这让丹尼在学校放假期间负责照顾她变得很困难。他并不想照顾奶奶。

不过，不久之后，丹尼就发现，奶奶可没有她看上去那么简单，而且他们的共同点比他想象的要多......

Eleven-year-old Danny Chung loves drawing more than anything - certainly more than maths, which, according to his dad and everyone else, is what he is 'supposed' to be good at. He also loves having his own room where he can draw in peace, so his life is turned upside down when a surprise that he's been promised turns out to be his little, wrinkly, ex-maths-champion grandmother from China. What's worse, Nai Nai has to share his room, AND she takes the top bunk!

Nai Nai can't speak a word of English, which doesn't make things easy for Danny when he is charged with looking after her during his school holidays. Babysitting Nai Nai is NOT what he wants to be doing!

Before long though it becomes clear to Danny that there is more to Nai Nai than meets the eye, and that they have more in common that he thought possible ...