After a car breakdown, Baron and his assistant Sophie had to stay in a cottage in the countryside. The owners were a pair of siblings: the older brother Sean, a tall and handsome officer, and the younger sister Mary, a frail and beautiful girl. Mary candidly admitted that she was an alien with a special ability to predict the future through dreams. Recently, Mary had been very anxious because in her dreams, she killed the Baron! Sean often took walks in the woods with Sophie, and he didn’t know why but felt happy just being with her. This feeling made him a little uneasy as it reminded him of a girl from his past who had similarly entered his life and then inexplicably disappeared… In order to resolve Mary's inner turmoil, the Baron took her to a place from her dreams, and everything in the dream truly happened, with a shadow stabbing at the Baron! In that moment, Mary stood in front of the Baron… When the Baron saved the injured Mary, he heard that Sophie was in danger! Sean, it turned out, was a dual soul demon! Dual soul demons are a cursed alien species formed from a spore that splits; they are one entity, living and dying together. When they like someone, their other half hates that person; when they love someone, their other half kills the other person… The missing girl from before and the endangered Sophie now—he couldn't believe that his love had harmed the one he loved, Sean… Just as the Baron and Sean engaged in their dark duel, Sean also raised his cross sword—the kind Sean and the evil Sean would disappear from Earth forever...