A woman is trying to contact Kasama Tsuneo at a crisis point in his life. But she won't reveal her identity. Kasama is an immigration officer in Tokyo, struggling to live a 'normal' life after an event that happened eight years previously, when he lived in the USA. His arranged marriage is looming, and he's seized by a strange emotional fit. And then the disembodied voice begins. All Tsuneo can do is desperately chase this woman, and the mystery behind what happened eight years earlier over the sea.