Pluto is no longer a frozen frontier but a glittering industrial paradise, warmed by a vast man-made solar lens that bends sunlight across the planet. That fragile miracle is shattered when Sandra Drake recklessly drives her ship straight through the lens axis, triggering a catastrophic failure that sends the whole system spinning toward disaster. With the artificial sun lurching out of control, John McBride must race to save Pluto before the roaming beam turns the colony into a scorched wasteland. As station manager, McBride battles power losses, wrecked machinery, injured crews, and collapsing communications while coordinating repairs across the lens network. He clashes with the brilliant, defiant Sandra, whose arrival only deepens the crisis, and relies on the steady intelligence of his wife, Enid, as the emergency grows more personal. With Pluto's survival hanging on delicate charge reversals, risky medical boosts, and the near-impossible restoration of the lens, the story delivers hard-science suspense, sharp banter, and a tense, fast-moving rescue in which human ingenuity is the last defense against planetary catastrophe. This edition has been fully restored with modern typesetting, custom cover design.