An elderly inmate serving a life sentence awaits a lonely death in his solitary cell—until a voice calls out to him. It belongs to a balsam flower, Housenka, that speaks like a human. Through their "conversation", the old man begins to reflect on the life he's led.

An elderly inmate serving a life sentence awaits a lonely death in his solitary cell—until a voice calls out to him. It belongs to a balsam flower, Housenka, that speaks like a human. Through their "conversation", the old man begins to reflect on the life he's led.

Reconstruction of the television anime that will also depict what happens after its finale with a new story written by Kazuya Konomoto.

41岁的出租车司机小户川没有家人，不太跟他人有瓜葛，没几个熟人。他的乘客都是一些怪人。跟乘客看似无关痛痒的对话当中，隐藏着一名失踪少女的线索。