The story opens with a middle-aged Dmitry Sanin rummaging through the papers in his study when he comes across a small cross set with garnets, which sends his thoughts back thirty years to 1840. In the summer of 1840, a twenty-two-year-old Sanin, arrives in Frankfurt en route home to Russia from Italy at the culmination of a European tour. During his one-day layover he visits a confectioner's shop where he is rushed upon by a beautiful young woman who emerges frantic from the back room. She is Gemma Roselli, the daughter of the shop's proprietress, Leonora Roselli. Gemma implores Sanin to help her younger brother who has passed out and seems to have stopped breathing. Thanks to Sanin's aid, the boy - whose name is Emilio - emerges from his faint. Grateful for his assistance, Gemma invites Sanin to return to the shop later in the evening to enjoy a cup of chocolate with the family.