Around Two Years Ago , "The Immersion" Incident Happened , doctors correlated it with the spread of the "Victomurs Virus" (VV) , a virus that causes patients to start seeing visions of deadly monsters that only has the instinct to prey on the victims .
"Drystan Dawn" , a guy in his twenties who just wants a fulfilling job and a comfortable life , gained the ability to see the monster's only patients can see , and does his best to help them , unknowing of the intertwined destiny and challenges awaiting his perilous road