Jae-suk, Kwang-soo and Yu-ri are sent into the space for a mission. The three members must survive four hours in the unknown!
E1 · Stress Zone
The first mission is to stay healthy. However, enemies are lurking around.
E2 · Save Zone
The members enjoy a peaceful space of healing which soon turns into disaster.
E3 · Automatic Zone
The members go on an adventure in a cosy AI bed. However, the machine goes haywire.
E4 · Virus Zone II
An unidentified presence appears before the members who have returned as lifeguards.
E5 · Mystery Zone
The members enter the lively Hwayang Village. However, mysterious events continue to follow them.
E6 · Play Zone
A PLAY ZONE is created for the members who have been through a lot. A lot of memorable childhood games are gathered in a questionable area. If they cannot avoid it, they might as well enjoy it. The spin-chilling fun of holding out begins!
E7 · Analog Zone
The members have to survive alone in an underground bunker with no forms of communication.
E8 · Battle Zone
The members must destroy the enemy's base through a battle.
