On June 8, 1878, a natural disaster swept across the world. Countless humans lost their lives and turned into monsters. Since then, endless "cannibalism" has begun. People who survived described this disaster as a horror that had never seen the light of day, so they called it "solar disease."
Nearly two hundred years later, humans will gradually master the power to fight against solar disease and gradually return to daily life.
Lu Hean is an ordinary high school student living in such an ordinary life, living the same life every day, looking forward to the arrival of an exam.
But after experiencing a solar attack that accidentally occurred in Thirteen Cities, his ordinary life became a broken cup that could never be restored.
