On a stormy summer day the Aosawas, owners of a prominent local hospital, host a large birthday party. The occasion turns into tragedy when 17 people die from cyanide in their drinks. The only surviving links to what might have happened are a cryptic verse that could be the killer's, and the physician's bewitching blind daughter, Hisako, the only person spared injury. An award-winning crime novel from Japan - based on fact.