A Ferret surveillance vessel had disappeared for a period of time, and upon its discovery, all 115 individuals onboard were nowhere to be found, leaving no indication of their whereabouts.
Masato was assigned to supply his sister, an employee of Ferret, for the company's impending investigation of the enigmatic vessel that had returned without its crew. At Ferret, he encountered Uto, an alluring lady who shared similar circumstances as her brother vanished while working for the company on the same vessel. Together, Masato and Uto must launch an expedition to uncover the secrets of the uncharted island where the crew had mysteriously disappeared.
