Vanishing Time: A Boy Who Returned

Vanishing Time: A Boy Who Returned is a 2016 South Korean fantasy film written and directed by Um Tae-hwa and starring Gang Dong-won and Shin Eun-soo. This is the second feature film by Um Tae-hwa. The idea of the film was strongly influenced by the sinking of MV Sewol which occurred in 2014. Um explained that after the Sewol disaster, the government tried to hide the truth, and therefore he decided to shoot a film where the main theme of which is a search for truth.

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

Main

 * Gang Dong-won as Sung-min
 * Lee Hyo-je as young Sung-min
 * Shin Eun-soo as Soo-rin

Supporting

 * Uhm Tae-goo as Tae-shik
 * Kim Dan-yool as young Tae-shik
 * Kim Hee-won as Do-kyun
 * Kwon Hae-hyo as Baek-ki
 * Jung Woo-jin as Jae-wook
 * Park Jong-hwan as Jin-sung
 * Park Jin-woo as Tae-shik's father
 * Park Sung-yeon as Tae-shik's mother
 * Kim Tae-han as Jae-wook's father
 * Kim Jung-young as Jae-wook's mother
 * Oh Hee-joon as Search police
 * Kim Hak-sun as Section chief Park
 * Seo Joo-hee as Orphanage director
 * Ahn Ji-ho as Sang-chul
 * Ahn Sang-woo as Sang-chul's father
 * Ok Jae-sub as Tae-shik's grandfather

Special appearance

 * Moon So-ri as Dr. Min