S03:E14 - The Secret

A stranger attacks Veronica, knocking her unconscious and leaving behind a white tile with a mysterious insignia. While Roxton takes Veronica to the treehouse, Marguerite is sure to cover up the tile--an artifact that she recognizes as the calling card of a dangerous character from her past. Marguerite must reconcile with the dark secrets of her former life before they endanger her and her friends.