Seo Dong Joo, portrayed by Park Hyung Sik, survives a near-fatal ordeal orchestrated by Yum Jang Sun (Heo Joon Ho) but suffers from amnesia, forgetting his identity and past, including his deep love for Yeo Eun Nam (Hong Hwa Yeon). As he struggles to regain his memories, Dong Joo faces relentless torture by Jang Sun's men, who aim to extract the new password for his Swiss bank account. Simultaneously, Eun Nam remains trapped in a loveless marriage, leading both characters through painful and transformative journeys.