"Guard the blue sky and white clouds..." His father's words were still in his ears, but the guardian himself was mercilessly swallowed by the sky. Can she continue to pursue the dream built on her father's back? The dream about flying and protecting seemed so fragile, so distant, and even... With a cruel irony in the face of the severe pain of losing a loved one and the cold reality of survival. The huge shadow shrouded her, not only swallowing her father, but also seemed to completely extinguish the weak flame called "flight" that had just been ignited in her heart. The road ahead seemed to be completely blocked by this sudden darkness, leaving only heavy confusion and endless sadness...