On Homecoming Day, Myungjoon discovers an old cassette tape with recordings of his past diary entries. Hoping to correct his mistakes, he revisits pivotal moments in his life, but his actions trigger uncontrollable consequences. Trapped in an endless time loop, reality distorts as he desperately tries to rewrite the past. His obsession drives him to horrifying extremes—murdering loved ones and risking his own life. As he battles forces beyond his control, he questions the blurred boundary between dreams and reality, echoing Zhuangzi’s The Butterfly Dream, and confronting the inescapable nature of karma.
After the death of his wife, Jong-Sub (Kang Shin Sung Il) raised his son alone. He lost his son in a car accident. Since the death of his son, Jong-Sub lived all alone. He retired from his job as a principle. Jong-Sub is then diagnosed with colon cancer and learns he has only 6 months left to live. All his desire to live is gone, but he still wants to keep his dignity. Jong-Sub tries to hire a caregiver. A woman named Yeon-Hwa (Bae Seul-Ki) comes to him. She is beautiful, but looks sad. Watching Yeon-Hwa, Jong-Sub sees his dead wife. He is shaken by her and wants to live more with her. Jong-Sub realizes he loves her and faces a truth he can't believe.
Gong Pil-du is a detective recruited for his athletic skills and achievement, a bronze Universiade medalist in wrestling. Since then, however, he has had little success in his career, and remains a 40-year old bachelor with a terrible credit record. His greatest crisis comes when his beloved father needs money for crucial surgery. To get the money, Gong makes a deal with a vicious crime boss. This makes him more miserable than ever, as he is now suspected as a corrupt cop. Gong goes on a quest to prove his innocence. Will he be successful for once in his life?
Burnt-out transit cop Jay forms an unlikely alliance with pickpocket Kay to stop a terrorist hijacker from blowing up a subway car during rush hour.