Hanna, an adopted child suffering from a mental illness, awakens in Chuncheon, losing consciousness. She discovers an old missing person poster that looks just like her and begins to unravel the secrets of a case that happened 50 years ago. The events surrounding her past life's death resurface, and the performance of Jin-kyu, who desperately calls for his lost love, transcends the karma of life, making their reunion possible. However, this reunion leads to another dilemma for the two.