After narrowly escaping a deathtrap, a dazed Ning Yuan finds himself confined by a menacing gangster, He Zhiyang, alongside hysterical doctor, Su Jin. However, this proves to be the least of his concerns as he comes to terms with the group's newfound desperate situation: they are trapped on an isolated island that harbors malignant viruses, horrid mutations, and hostile tribes. Meanwhile, another group of individuals in the same vicinity happen to face the same predicament. Forced to put aside their differences and come together to fight their way to freedom, the two groups of stranded victims must resist their personal motivations which threaten to get the better of them.

The courtyard is awash with cherry blossom petals, appearing especially beautiful in the moonlight. Kagura, waking up, sits in the hallway facing the courtyard, "The courtyard at night, seems like something can happen anytime......" Suddenly a butterfly glides past, its scales glittering. Kochou no Sei: That's right. Nighttime is indeed suitable for telling stories. Kagura grows sleepy under the influence of dust. Kochou no Sei: After Kagura-sama falls asleep - that will be the beginning of the story in the dream! (Source: Onmyoji Wiki)