Chen Mo, a programmer who pushed himself to the limit, unexpectedly died from overwork and arrived in the underworld. To his surprise, he became a troublesome "overflow bug" in the Underworld Group's thousand-year-old System: his soul number exceeded the limit, so the system rejected his application! To get himself officially registered, and to pave the way for those who come after him, Chen Mo must find a solution in this eternally running "mountain of code." He meets a senior who slacks his way to immortality, colleagues trapped in endless overtime, and the sadness of watching memories fade as the living world forgets. Beneath the underworld's "iron rice bowl" of "never being out of work," Chen Mo begins to wonder: in a nearly infinite stretch of time, how can he regain a sense of what it means to live and create value of his own? This is a wondrous journey about farewells, adaptation, and finding meaning in hardship.
