When faced with uncertainty, high schooler Ryouhei Arisu escapes into a bar with his best buddies, Daikichi Karube and Chouta Segawa. A strange turn of events leads them from a night of fireworks to waking up in a desolate world. Thriving in the emptiness, Arisu's newfound freedom is short-lived as they stumble into a festival that turns out to be a deadly game setting. Venturing into the enigmatic Borderland, a perilous realm where every game is a fight for survival, Arisu and his friends must tread carefully to avoid a fatal end.