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.