At this exact second, roughly 100 trillion neutrinos are zipping through your body, yet you don't feel a thing. To "catch" these "ghost particles", Jiangmen Underground Neutrino Observatory (JUNO) is operating silently 700 meters beneath Jiangmen, Guangdong province. Using 45,000 ultra-sensitive "eyes" to peer into the void, JUNO waits for that rare and fleeting spark left by a neutrino. Where do they come from, and what cosmic secrets do they hold?