The students left for a clean-up tour along with their teacher Park Lee as they had planned. They targeted the closest beach to their school in an attempt to clean the shores, and to show the students how awful can things get due to human ignorance. Field trips are much better while addressing such issues instead of sitting inside a classroom and watching a presentation over the screen, as the students get to see the real-life scenario that helps them understand things better. Also not to mention that they are much enjoyable and fun.