Trapped in a deadly cursed Mafia game, the students of Yoo-il High must play the game to survive while unraveling the mysteries behind the curse.

The main content is a time-slip web-based drama in which the Emergency Rescue Department student relief type drinks mysterious beverages and returns to five years ago and tries to save his first love with the help of Mannequin Annie. It basically aims at forecasting the accidents and disasters that can be experienced in youth training facilities and outdoor activities and amusing ways to cope with them.