Beyond Uranus, where communication lags hours behind and the cold can kill in seconds, Outpost Theta stands as humanity's most remote frontier. When strange seismic readings escalate into a catastrophic rupture, a massive rift swallows part of the station-trapping survivors in a maze of ice tunnels far below the surface. Kaito Fen, still haunted by past disasters, is thrust into a role he never wanted. Commander Lysa must lead a desperate rescue while the entire moon shows signs of collapse. Eila hides worsening radiation sickness to continue the mission, and Marik confronts the specter of an old cave-in that once defined his life. As the team ventures deeper, they encounter resonant "ice songs," predictive seismic patterns that hint at an even greater catastrophe approaching. Time is running out: the rift is widening, the tunnels are failing, and every ascent route is vanishing. To survive, they must climb, leap, and fight their way back to the surface-before Miranda itself fractures beyond repair.