It is said that the country of Suzaku is protected by the spirit of the legendary White Dragon, a mythical benevolent being. A young maiden known as "dragon sorceress" always resides in the temple. Her protectors are young men which are called "sword dancers". One night, the current dragon sorceress, a girl named Setsuna, was attacked by a horrifying monster. Her sword dancer, Hien, tried to save her; but the monster was stronger and flew away with the girl. The young hero swears to bring her back, restoring his honor and the peace in his country.
Jinpachi Tanaka is a paranormal investigator who possesses the powers of detecting and fighting demonic creatures. As these demons are usually female and pretty, they can easily pose as humans, and Jinpachi must use somewhat unorthodox techniques to tell friend from foe. Jinpachi and his employees must cooperate with the police and avert grave dangers posed by an angry female demon who has sworn revenge against the hero.
Bacta is a Japanese-style adventure game. The player is presented with a text menu containing verbs, most of which lead to sub-menus with objects. Some of these commands are context-specific, while others ("Look", "Talk", "Move", etc.) are present in every situation. Sometimes events must be triggered by repeatedly selecting commands.