Although they appear to have resumed their ordinary lives, Kei Kurono, Masaru Katou, and Kei Kishimoto are dragged back into the deadly game following Gantz's recent activity. The black sphere keeps summoning those who have recently died to battle alien invaders. Having survived the two prior encounters, the trio is more than ready for the missions ahead. As they advance through the tournament's stages, the three continue their effort to accumulate 100 points, which is rumored to be the sole method for permanently exiting the parallel dimension. Yet, faced with the relentless assault of alien invaders and the looming threat of death, they must first concentrate on the immediate task at hand: survival.