The combination of being an 'exception' and based on a 'true story' is likely to be what makes it special. True stories often have a certain power to engage readers or viewers because they are real. And when it's about an exception, it adds an element of surprise and intrigue. It could be a story that reveals hidden aspects of a historical event or a modern - day situation. It might also have the potential to inspire people by showing that even in the face of what is considered normal, exceptions can occur and bring about positive change.
One example could be in a sports context. For instance, a player might make an 'exception move' during a game that defies the normal tactics. Say in a basketball game, a player jumps from an unexpected angle to make a shot, and this was inspired by a real - life incident they witnessed or experienced. Maybe they saw a street basketball player do a similar move and incorporated it into their professional play.