(This novel won an Excellence Award in the Fourth Realistic Fiction Writing Contest.) Electricity has become an essential part of everyday life. After graduating from university, Wen Xiaonuan voluntarily gave up an office job in the city and went to a township power supply station with harsh working conditions, applying to become its only female electrician. Facing her colleagues' doubts and customers' unreasonable demands, Wen Xiaonuan overcame one challenge after another. She carried out emergency repairs in howling storms, in blistering heat, and in the darkness before dawn, bringing light to countless households. She also performed live-line work, dancing with electricity at every level of voltage: from low-voltage 0.4-kilovolt lines to medium-voltage 10-kilovolt lines, high-voltage 110- and 220-kilovolt lines, extra-high-voltage 500-kilovolt lines, and ultra-high-voltage 1,000-kilovolt lines. Step by step, she grew into a guardian of the lights in countless homes. She also helped her hometown find prosperity through electricity by promoting the replacement of other energy sources with electricity and using drones for power-line protection, making the dream of rural revitalization a reality. This book is dedicated to the countless frontline power workers who quietly devote themselves to their work in the new era.