Another theme might be redemption. The characters in the 'the secret drama true story' could be trying to redeem themselves for past secrets or wrongdoings. For example, an actor who had a secret that could ruin their career might be on a journey to make things right.
One possible theme could be secrecy itself. How secrets can both protect and harm the characters involved. For example, a character might keep a secret to protect a loved one but end up causing more trouble because of it.
One possible theme could be betrayal. If it's a scandal, there might be someone who has been betrayed, like in a case of corporate espionage where an employee betrays the company.
One possible theme could be mystery. A secret door often implies something hidden and unknown, which creates a sense of mystery.
One possible theme could be guilt. If she's keeping a secret, she might be feeling guilty about it, and that could be a major part of the story.
One possible theme could be transformation. Maybe the story shows how the protagonist's life is transformed by their interaction with the billionaire. Another theme might be secrecy itself, exploring why the billionaire has secrets and how they are kept or revealed.
One possible theme could be secrecy itself. How secrets are kept, what the consequences of keeping or revealing secrets are. Another theme might be about Melanie's identity, and how these secrets are related to who she is.
Love and relationships can be a theme as well. How her new status as an heiress affects her relationships, both romantic and with family and friends. For example, does her new - found wealth attract false friends or does it put a strain on her existing relationships? Also, the theme of self - discovery is important. As she uncovers the truth about her inheritance, she also discovers more about herself, her family's past, and what she really wants in life.
One possible theme could be mystery. Since it's a secret story, there must be elements that are not immediately known and need to be uncovered.
One possible theme could be mystery. Since it's a secret basement, there's an air of mystery about what's inside it.
Friendship could also be a theme. Since she can't rely solely on her royal status, she has to make real friends. Through her secret, she might attract people who like her for who she is, not what she is, and these friendships help her in her journey in the 'the secret princess story'.