The scientist and his two female assistants work on ESP research in a remote science laboratory. One day, a section of the lab blows up. It turned out that the monsters kept for experiments escaped and took one of the assistants with them. The scientist gives an "ESP booster" to the remaining assistant so she can go rescue her.
You play as the psychic assistant, who possesses powers that she uses to blast away enemies. You start with few powers and gain more as you collect items dropped by monsters. Your arsenal includes fire, ice, sonic waves, temporary invincibility, levitation, and others. Press Down + Button 2 to access your powers.