Chen Mo, a 24-year-old courier, works himself to the bone to save his sick younger sister. During a violent thunderstorm, he accidentally binds to a cross-dimensional delivery System and is forcibly transported to a zombie-ravaged wasteland, where a trial of life and death begins.
Earth's surface appears calm, but cracks into other realms are opening in secret. He can package loot from other worlds and send it back to designated receiving stations on Earth, earning points and access privileges in return.
His first mission is a near-suicidal ordeal: his teammates betray him, and he has to seize the core alone. When he makes it back, the military is stunned. They establish the Otherworld Resources Administration and officially appoint him humanity's first cross-dimensional envoy.
Every piece of loot could determine the fate of civilization, and every trip risks his life. He is a courier, but also humanity's only hope for protecting its future.