1. Travel Back

The cast arrive at their hotel in Bali, Indonesia. They leave their luggage in their shared living room and go to eat. Upon returning to their room, they find that their luggage is missing and has been replaced with backpacks. The cast are told that they have traveled back in time to 2002, when they were still trainees. Because of this, all their electronic devices are confiscated and exchanged with devices that were present in 2002 such as MP3 players and non-smart mobile phone. They are given instructions on how to return to the present time; by carrying out the tasks given to them, which includes filling up a photo album with photos taken at specific places, and composing a theme song for their trip.