What would you do if someone suddenly called out to you on the street? This time, we're taking on a grueling "mission completion game" set in a phone booth in the middle of the city! Four enthusiastic challengers have gathered to take part. The rules are simple: enter the phone booth and complete all the missions heard through the receiver to win the prize money! However, you're completely visible from the outside, and you absolutely cannot leave until you've completed the mission...