Rumblings in the Mist

"May you not have to experience the horrors of the mist..."
Something strange happens to Cinq Ville. The whole city is enveloped in a weird mist, in which there are rumbling noises from underground in the areas effected. Now that almost half the city goers are missing, the Hunters Ashe and Grey and Guardians Vent and Aile must find away to dive off the mist and discover the cause of the disappearances in the city, all with the help of a Cyber Elf.