晨曦将至

栗原佐都子（永作博美 饰）与丈夫清和（井浦新 饰）结婚多年，夫妻两人之间的感情一直十分的美满，这段婚姻唯一的遗憾，就是两人无法拥有一个属于他们的爱情结晶。通过特别收养制度，佐都子和清和收养了一个名叫朝斗（佐藤令望 饰）的孩子，朝斗的存在圆了佐都子和清和的梦，让这一家人更加紧密的联结在了一起。 　　一晃眼六年过去，这六年里，栗原一家人生活在平静和幸福之中，佐都子和清和将他们全部的爱都倾注在了朝斗的身上，朝斗也无惊无险的顺利成长。某一日，一通意料之外的电话打破了栗原家的平静，来电的女人自称是朝斗的亲生母亲片仓光（莳田彩珠 饰），她要求栗原夫妇花钱买下朝斗，否则就要将朝斗的身世公之于众。It is not strange or unusual for a couple to want to procreate and have a child. However, things are not proceeding smoothly for this husband and wife. Despite steadily trying to get the wife pregnant the couple yield to reality and, exhorted by a professional association, the couple proceed to adopt a boy. The couple are happily adapting to their adopted son, but a woman shows up soon enough emphasizing she is the boy's biological mother. The two mothers are about to face off.