上野树里在结束大河剧拍摄后，为“テレビ東京”电视台拍摄纪录片，探寻日本樱花的起源。途经尼泊尔-喜马拉雅、中国云南省、冲绳、地震灾区岩手等地，历时半年，行程5400公里，体验各地风土人情，感悟樱花与人的羁绊。

Whenayoungwoman'smurdershowssimilaritiestoadecade-oldcoldcase,(acruelandgruesomemurderofayoungstudent,whichremainsunsolved)anewPoliceCommander(CommissionerMichalTrela)mustbreakthesilencepermeatinganOwlMountaintown.Yearslateranothercrimeiscommittedsimilartothedecadesoldcoldcase.CommissionerMichalTrelafacesawallofsilencefromtheOwlMountaincommunity,whereeveryoneseemsguilty-Willhebeabletosolvethecrimeorwillitbecomeanothercoldcase?