Adapted from the book with the same title by Ryusho Kadota, a journalist who followed the "Hikari City Mother and Child Murder Case" that took place in Hikari City, Yamaguchi Prefecture in 1999, the drama is a fictionalized human story of a bereaved family that suffered repeated setbacks and was on the verge of despair, but continued to fight on with the support of others.

光市母女杀害事件是指1999年4月14日，日本山口县光市一名年仅18岁的青少年闯入民宅杀害女屋主后对遗体奸淫，然后杀害其11个月大女儿的重大杀人案。嫌犯福田孝行于2008年4月22日遭广岛高等裁判所判处死刑。2012年2月20日，光市母女杀害事件被告人大月孝行（原名为福田孝行，后改姓大月）死刑定谳。