"Abandoned Heiress Gets Rich with Alchemy" centers on a young noblewoman named Leticia, who is cast out of her family after being falsely accused of a crime she did not commit. Stripped of her title and inheritance, she finds herself struggling to survive in a world that has turned its back on her. However, Leticia possesses a rare talent for alchemy, a skill she had secretly honed during her time in the noble household. Using her knowledge of alchemy, she begins to rebuild her life from the ground up, transforming common materials into valuable goods and gradually amassing wealth.

The story explores Leticia's journey as she navigates the challenges of her new life, from earning a living to dealing with societal prejudice against those of lower status. Her alchemical abilities attract both allies and adversaries, including merchants seeking her skills and rival alchemists envious of her talent. Along the way, she forms meaningful relationships with individuals who support her, such as a kind-hearted merchant and a former knight who becomes her protector. These connections help her gain confidence and purpose beyond her noble upbringing.

As Leticia's reputation grows, she begins to uncover the truth behind her family's betrayal and the conspiracy that led to her downfall. The narrative delves into themes of resilience, self-reliance, and the pursuit of justice, as Leticia uses her newfound wealth and influence to challenge the corrupt systems that once oppressed her. The story balances her personal growth with the intrigue of political machinations, creating a compelling tale of redemption and empowerment. The alchemy system is intricately woven into the plot, serving as both a tool for survival and a means of advancing the story's central conflicts.