姑獲鳥の夏

Kuonji Kyouko, the daughter of a family-run obstetric clinic in Tokyo's Zoushigaya, has been pregnant for 20 months. 3 months into her pregancy her husband Makio vanished from a locked room in the clinic. Her sister Ryouko wants to unravel the mystery around her family's clinic and contacts detective Enokizu and his "assistant" Sekuguchi.