The beautiful Countess Eléonore welcomes Prince Rénine, alias Arsène Lupin, into her home. An unknown woman breaks into the house and steals the painting given to the countess by the supposed prince. A few hours later, the painting is returned to its place. On the floor, at the foot of the painting, lies the body of a young man who bears a striking resemblance to the portrait on the canvas. The police burst into Arsène Lupin's home and charge him with murder. The gentleman thief manages a daring escape, but not before stealing the guards' pay...