Forced to build an underground fortress for SHADOW, a construction crew rebels in a bid for freedom, but suffers severe casualties. One of the workers, Daizo, surrenders to stop the slaughter, but is labeled a traitor. Mari discovers Daizo's children in the freezing cold, and sacrifices herself to keep them warm. Waruda takes the frozen body of Mari away with Ichiro in hot pursuit. Can 01 save Mari and the construction workers?