Coast Guard Special Forces 4
Septiembre de 2021. Un grupo de peligrosos delincuentes coreanos tiene que ser trasladado en un buque de carga de Manila a Busán. Los acompañan a bordo el capitán de la policía coreana Suk-woo y otros 22 detectives experimentados, cada uno con al menos 10 años de experiencia investigando crímenes violentos. Pronto, la prisión flotante abandona el puerto y comienza su camino hacia Corea. Los prisioneros están fuertemente custodiados y todo está tranquilo a bordo hasta que los criminales inician un motín.
Jin-tae
Yoo-ra suffers from nightmares every night. One day she meets her high school friends. Jin-tae is a promising artist, In-seok is a chaebol and former thug, Hye-jin likes In-seok, and Seong-ho, who used to be In-seok's errand boy, finally meet up. Yoo-ra asks her friends if they remember the classmate that killed herself. Everyone is flustered and claims they don't.
Yoo-ra goes to the bathroom, but passes out after seeing herself in the mirror. Everyone gets in In-seok's car to send Yoo-ra home, but they get into an accident and all become unconscious. When they wake up, they are at a familiar school that's closed. It was the school they went to that has closed down.
