Yorito Morimiya loves taking pictures of the sky so much that one day, he wakes up at 4 am to take pictures of the sunrise overlooking the bay. However, he is interrupted when he meets a strange girl trying to force a vending machine to give her money back. Yorito helps her but when the machine finally returns her change, the girl has mysteriouslly vanished. She then appears again in a church and meets this man that is hunting yakas meaning people who cannot stand sunlight or "woe of the night". Soon Yorito finds out that the girl is not a human.