This book meticulously examines a specific unsolved case in South Korea, beginning with the devastating incident that shattered a quiet community and tracing the life and dreams of the victim. It recounts the initial confusion, the challenges faced by the first witnesses, and the critical early moments of the investigation, including issues with scene preservation and the spread of shock and anxiety throughout the area. The narrative highlights how these initial struggles cast the first shadow of the case remaining unsolved. The book then delves into the significant limitations of the initial investigation, critically analyzing problems with crime scene analysis, flawed alibi verification, errors in evidence handling, difficulties in obtaining reliable witness statements, and systemic inefficiencies within the investigation team. It also profoundly captures the enduring pain of the victim's family and community, detailing their grief, their lonely fight for justice, and the lasting trauma left by the unresolved crime, emphasizing the lack of support systems for those left behind by unsolved cases. The latter part of the book explores the potential for reinvestigation, discussing how re-examining old records, applying modern forensic science, and seeking new witnesses could potentially uncover buried clues. It touches upon the role of criminal profiling in analyzing suspects and revisiting the actions of individuals around the time of the incident. The author, Mariam, shares her personal journey of pursuing the truth, detailing the motivations, the challenging interview process, the difficulties and breakthroughs in data analysis, and the emotional toll of revisiting the crime scene. The book broadens its scope to reflect on the nature of justice itself, analyzing statistics on unsolved cases, critiquing the judicial system's limitations, discussing the significance of abolishing the statute of limitations, and proposing policy changes and societal efforts for better resolution and prevention. Ultimately, "Traces of a Lost Life" serves as a poignant reflection on the unanswered questions that linger, the dark aspects of human nature, the social distrust and fear left by unsolved cases, and the moral imperative to remember the victims and continue the pursuit of truth, asserting that the record must continue for justice yet to come.