AftertheGreatEarthquakeinNortheasternJapan,Mitsuoissenttoamentalhospitalfromthestrainofgrieffromworkingtoclearoutthedebrisofthedisaster.Whenheisreleased3yearslater,hefeelsamomentofhappinessasheiswelcomedbackbyhisbrotherYuta,hiswifeYoko,theirfirstdaughterChie,andtheirseconddaughterItsuki,whohasadownsyndrome.Thenextday,Chiewishestogototheamusementpark,andMitsuotakesChieandItsukithere.Butthesehappymomentsdon'tlastlong,andtheincidenthappensatthepark.ChiedroppedItsukiontheconcretewhenMitsuotookhi