"Dirty John" is a true crime podcast and later a television series that tells the story of John Meehan, a con artist who deceives and manipulates women. The narrative focuses on his relationship with Debra Newell, a successful interior designer, and how he ingratiates himself into her life while hiding his dark past. The story explores themes of trust, deception, and the impact of toxic relationships. It highlights the dangers of online dating and the importance of being cautious when meeting new people. The podcast and series have gained popularity for their gripping storytelling and real-life implications.