At the Palace of Versailles, the Cat's Eyes take advantage of a very private auction, costumed in the style of the Grand Siècle, to try to steal paintings that belonged to their father...

The Cat's Eyes must penetrate the Bastion, the ultra-secure headquarters of the Parisian Police, in order to recover a video that very clearly incriminates Tamara. But Quentin, and especially Gwen, are never far away.