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.
Eleda and Adele, identical twins, discover they are Truth-Tellers and Safe-Keepers, respectively. Truth-Tellers cannot lie and can detect lies in others, making them essential to society's trust.