A relationship, whether romantic or platonic, can sometimes be a dangerous thing - especially after it ends. `My Crazy Ex' tells stories of people who have revisited past relationships, bringing their behaviour to a point that reaches the level of being excessive or even extreme. Each hourlong episode describes multiple true-life tales, including a woman who reappears in the life of a casual high school friend years after they graduated, and a bachelor who gets involved in a sticky situation with a sweet Southern belle.