After high school student Cheng Nanxing wakes from a dream, the life he knew so well it had become dull begins heading in an unpredictable direction: a missing girl appears out of nowhere at the end of a bridge, murmuring the song from his dream while unconscious; deja vu that runs counter to his memories; a friend acting strangely in a time out of joint; a hornless sika deer gazing up at an eclipse in the pouring rain; and a girl in black who keeps appearing whenever he is alone. She always vanishes at a touch, yet without him realizing it, she guides him step by step to break free from the dark thorns woven by a false reality. He keeps searching for the truth in his heart amid loss, but just as he is about to reach it, the torrential rain overwhelms him. He sees a sika deer nimbly leap through the rain and meet his gaze. Starlight blooms and shines from its antlers, sustaining the beginning even as it foretells the end.