Two fathers' lives intersect when one of them is involved in a terrible and sudden hit-and-run car accident that leaves the other's son dead. In response, the two men react in unexpected ways as a reckoning looms in the near future.

Kanji Watanabe is a middle-aged man who has worked in the same monotonous bureaucratic position for decades. Learning he has cancer, he starts to look for the meaning of his life.