Takashi and his wife Misako, who lost their beloved son in a trapeze accident, have never recovered from the shock, and have kept the urn in their bedroom because they do not want to leave their son's ashes. One day, the couple hears that they can see their son if they go to the old Isejin Tunnel.
Mizunuma is struggling to pay back his debts as always, and flies to Okinawa in an attempt to illegally sell a diamond that he confiscated from the yakuza to a jewelry broker.
Kaoru is a former racing driver who retired two years ago. She is invited by her brother Saburo to return to Team Alesis, which he owns, as a B driver. However, the mechanics don't think it's a good idea for Kaoru, a woman, to be driving, and their relationship becomes awkward.
A modern Japanese family loses their youngest son in a tragedy. The mother, Misako, plunges into depression and the oldest son Akira starts blaming himself for the death of his brother.
