Half a year has passed since I lost my wife, and I've been drowning in loneliness ever since. To comfort my grieving heart, my son and his wife, Saori, planned a birthday celebration for me. Saori bears a striking resemblance to my late wife—so much so that just locking eyes with her makes my heart race uncontrollably. But on the day of the party, a massive typhoon approaches, and my son calls to cancel. Just as I resign myself to another lonely, miserable birthday, Saori suddenly appears at my door—soaked to the bone, drenched by the storm's relentless downpour.