If you are talking about a place where you can go to buy things, the words 'shop' and 'store' have the same meaning. 'Store' is used mainly in American English. 'Shop' is the word used most of the time in British English. Bookshop and toyshop, for example. British English has the term 'department store' , and occasionally uses 'store' in the American sense for larger outlets.

it is store not story, like book store , toy store ,food store. it is usually used for a very large shop.