This novel tells the story of our main character who is reincarnated in the Bulgarian Metro and his adventures.

Martin Von Hael, an ordinary high school student, wakes reborn into the desolate, radiation-scarred labyrinth of the Bulgarian Metro. Decades after the surface burned, each subway station now hums with the dangerous sovereignty of warring factions, clinging to the last vestiges of civilization. Gifted with the unique Tree Skill System—a branching path of physical, mechanical, and metaphysical mastery—Martin faces an impossible choice: align with a station's ruthless overlords, brave the perilous tunnels between them, or dare to venture to the surface, a mutated wasteland teeming with grotesque monsters. His past life's cold detachment clashes with the raw desperation of this new world, forcing him to navigate a treacherous path where every decision could mean salvation or a horrific end, not just for himself, but potentially for all those trapped beneath the unforgiving earth. Can one boy's evolving power bridge the divide between a dying past and a monstrous future?