Psychology professor and famous author Eun Soo Hyun's life unravels when her son falls victim to an injustice that goes unpunished by the legal system. Having lost faith in the world, she decides to take matters into her own hands, seeking retribution for her son's death. Amidst her anguish, Eun Soo Hyun unexpectedly finds solace in assisting others entangled in mysterious cases akin to her own.