The Last Bit

In 2147, physicist Wu Xunyan discovers a terrifying truth: the universe could be destroyed at any moment. Not by an asteroid impact or a solar flare, but by the collapse of the laws of physics themselves—vacuum decay. Once it occurs, a vacuum bubble will expand at the speed of light, erasing all material structures along the way. To prevent the apocalypse, Wu Xunyan pilots the spacecraft 'Kuafu' alone, carrying humanity's first self-aware topological quantum computer 'Pangu', heading to an anomalous region 3,200 light-years away. During the four-month solitary voyage, Pangu discovers a mathematical structure that can rewrite vacuum with information—hyperbraid symmetry. The truth is far more complex: in that void lies an artificially created wormhole relic, left by another civilization already consumed by vacuum decay. Their only legacy is a beam of information across the universe: 'You are not alone.' And in the last Planck time before the universe collapses, Pangu makes a choice—using its entire existence to weave the smallest and most eternal thing a civilization can leave in the void: the last bit.