The film follows a 13-year-old boy named Sung-min went missing after his venture into a cave in a forest, along with Su-rin and other friends. Later, a mysterious man in his 30s shows up and tells Su-rin that he is her friend Sung-min.

• Vanishing Time: A Boy Who Returned
• Tae-hwa Eom
• Dong-won Gang
• Lee Hyo-Je
• Hee-won Kim