The drama is based on the best selling same-titled novel Minato Kanae, and is about two families that reside in the same upscale neighborhood. Amongst all the beautiful homes lined up in a row, there is a small house that belongs to the Endo family. Even though it is small, but it is a dream come true for Endo Mayumi. Living directly opposite them, is the elite Takahashi family. With their three gifted and smart children and a doctor husband, the Takahashis seem like a blessed and happy family.

One day, Takahashi Hiroyuki is found murdered. The police suspect the murderer is someone the family knows..