In the Hollow Night, monsters called Voids feed upon the power that manifests there, while those known as In-births use that same power for their own ends. While investigating the reason behind the sudden increase in the numbers of both Voids and In-births in the Hollow Night, Linne hears of an evil plot being hatched by someone calling themselves “Paradox”. This person turns out to be none other than Hilda, the leader of a shadowy organization known as “Amnesia”.