The Woman Who Took the Local Paper

The story

A man and a woman committed double suicide in Kanazawa City. Immediately after the incident, Yoshiko Shiota, a woman living in Tokyo, contacts the local newspaper of Kanazawa, saying she wants to read the novel serialized in it by Ryuji Sugimoto. How did this woman know the novel is serialized in the newspaper? And why does she want to start reading it in the middle of the story? Which article was she actually interested in? Sugimoto cannot help making his own investigations about Yoshiko, but the more he searches, the more astonishing facts come to light...