王湘湘和周诺言是太阳城恒星中学的学生。

两年前，湘湘的爷爷王亭在月亮城进行脑部手术。要是手术成功了，他就可以永远保留记忆；要是手术失败了，他就会失去所有的记忆。可惜手术之后，王亭就音讯全无，湘湘非常想念他。

有一天，湘湘竟然在太阳城的拼图店里见到爷爷的照片。追查之下，她发现照片里的人叫做王心，是拼图店店主王俊一的爷爷。王心不只跟爷爷长得一模一样，就连他的习惯和喜好，也跟爷爷很相似。然而，王心见到湘湘却像见到陌生人一般，对湘湘一点儿印象也没有。另一方面，湘湘更收到了匿名人的警告字条，要她停止追查下去，否则后果将不堪设想……

到底这个长得跟爷爷极像的王心是谁？他会不会就是失去了记忆的爷爷？王俊一又是什么来历？而阻止她追查爷爷的下落的人又是谁呢？一连串的疑问令湘湘更想把真相查出来。

这一次，湘湘将连同诺言，还有远在国外念书的好友萱儿，三个人紧密联系，再度发挥友情的力量，势必要破解这最后的谜团！

Author: Tang Show Yin

The above novel is the conclusion / part 3 regarding the continuation of the search for the missing chairman cum founder of the school.

In Sun City, the three adventurers found out that the chairman had done an operation 2 years ago and if the operation was successful, he could remember the past and if otherwise, he would forgot all the past events.

Soon, after the operation, the chairman was found missing again. In the Sun City, they encountered a shop selling puzzles and stumbled upon their founder’s picture that’s called by another name “Wang Xin”. They enquired about him and found out that his face, his preferences, his hobbies and almost everything resembled exactly like their long lost founder. However, this person said he had no impression at all about his granddaughter or the school he had founded.

Suddenly, “Xiang Xiang” received a mysterious letter, warning her not to continue their search for their missing founder cum grandfather otherwise mishaps will happen to her.

The question is ‘Wang Xin’ her real grandfather who had lost his memory or is another twin brother of her grandfather?”

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