Dirty John is a true-crime anthology series that explores the theme of love gone wrong, set against the backdrop of sunny Southern California. Each season follows a relationship from promising beginning to catastrophic end, raising the question of whether it's possible to really know someone, even the person one loves most. Through exploring the nuances and reframing the narratives of well-known cases, the series serves to remind the audience that there are two sides to every story, and people are often not quite as they seem.