女主角希和子与有妇之夫秋山相恋，有身孕后被哄骗堕胎，却发现情人的妻子生下一名女婴。骨肉的失去，爱人的背叛，在人生失去了一切的时候，她潜入情人家中，却意外被熟睡中婴儿的纯净无邪所触动，希和子决意带走情人的孩子自己抚养，将其取名为薰，开始了长达三年半之久的逃亡生活。

Kiwako Nonomiya is devastated after Takehiro Akiyama, the married man she has been having an affair with, manipulates her into getting an abortion by promising to marry her and then refusing to divorce his wife. Kiwako then learns of Takehiro's wife's pregnancy. One morning, while Takehiro and his wife Etsuko are away, Kiwako sneaks into their home to get a look at their six-month-old child. Without a thought for the consequences, she carries the baby away. Kiwako then raises the child as her own, while being a fugitive from the law.

「私はもう、今までの私とは違う。私はこの子の母なのだ。」不実な男との実らない愛。男は女が母となることを否定するかたわら、妻との間には子をもうける。絶望の中、女はその子を奪う。母になるとは、女として生きるとは・・・。血のつながりを越えた母子の５年半にわたる逃亡劇。