In Doll, the protagonist explores a world populated by robots that mirror human beings, known as Dolls. Through a series of tales, the book delves into a wide range of themes such as love, tragedy, humor, and irony, among others. These stories showcase the deep connection that owners have with their Dolls, and how easily they become a part of their lives. For instance, one tale revolves around a woman who has a supernatural bond with her Doll, which still affects her loved ones even after she is no more. Another story follows the journey of a man who tries to perfect his Doll as a romantic partner, only to realize the inherent flaws of humanity. In yet another narrative, a father buys a Doll for his bereaved son to help him cope with the loss of his mother. By examining the essential dynamics between humans and Dolls, Doll provides a unique insight into the true nature of humanity.