Watch Movies2Watch. During The Summer Vacation At Seventeen, Liu Mianshan Sets Off On An Adventure To The Quarantine Zone With His Friends Chen Menglong And Zhang Muduo. However, Conflict Erupts Among The Three As Their Triangular Relationship Falls Out Of Balance, Accidentally Causing Zhang Muduo To Fall Into A River And Vanish. Ten Years Later, With Encouragement From Chen Menglong, Liu Mianshan Finally Resolves To Confront His Past. He Travels Alone Through The Quarantine Zone And Arrives In An Unknown World. On His Journey To Search For Zhang Muduo, Liu Mianshan Gradually Pieces Together The Possibility Of An Alternate Life For Himself.