The members of Girls Bar, which is also the strongest female detective agency, confront the evil, and a movie of the same name novel by Fuyuki Shindo. Women who work at the girls bar "W Lounge" at night while working as office ladies, underground idols, teachers, etc. The "W Lounge" had another face, the strongest female detective agency fighting female enemies. A university student, a bud's friend, Airi disappears while leaving a debt of 3 million yen, and Airi's debt guarantor, Bud decides to work at "W Lounge" to repay the debt. According to a survey by the manager, Mona, who heard about the situation from the buds, and colleagues in the store, Airi gets information about being in a secret club called "Ruby Soul.".