When Mei Yamagawa's luxurious hot springs vacation goes awry, she finds herself playing chauffeur to a difficult elderly woman on New Year's Eve. After rescuing another confused senior from the streets, Mei uncovers a web of family secrets that threaten to unravel. Can she help heal a fractured family and still find time to ring in the New Year with her boyfriend Yasahiro? This heartwarming mystery explores family bonds, forgiveness, and Japanese New Year traditions.