Eleda and Adele, mirror twins, discover that they are a Truth-Teller and a Safe-Keeper, respectively. Truth-Tellers are incapable of telling lies and recognize when others are lying, so society relies on their unwavering trustworthiness.
The story revolves around Eleda and Adele, who are revealed to be a Truth-Teller and a Safe-Keeper, respectively. This implies that their abilities are vital to maintaining trust and safeguarding the truth within a society.