The sinking of MV Sewol, also known as the Sewol ferry disaster, occurred on the morning of 16 April 2014. MV Sewol was en route from Incheon Harbor to Jeju Island in South Korea. Out of 467 passengers and crew, 304 died in the disaster, including 250 students from Danwon High School (Ansan City) and 11 teachers. All but 5 of the bodies were recovered. To this day, the bereaved families are still seeking an in-depth investigation of the tragedy.
The following links provide a deeper insight:
‘Diving Bell; The Truth shall not sink with Sewol’ Documentary
This documentary won Grand Prize at the Fukuoka Asian Film Festival in Japan, 2015.
이 다큐멘터리는 2015년 후쿠오카 아시아 영화제에서 대상격인 그랑프리를 수상했다
You" (너) by 416 Choir
Composed by Lee Beomjun (이범준) and lyrics by Lee Namsil (이남실)

The Sewol ferry was lifted from the sea in 2017 and brought to Mokpo port, South Korea.