In an instant, all subways around the world derailed and plunged into the endless darkness of the earth!

Welcome to the Inner Earth! Please drive your train and try your best to survive!

Surface civilization has been completely destroyed, ancient underground monsters have awakened, and every subway station has become a death zone.

In her despair, intern Zhou Yang discovers that she has gained ultimate control over this "Nursing College Special Train"!

While other survivors huddled together in the wrecked carriage, shivering and fighting each other for a bottle of dirty water...

Zhou Yang has already activated the [Carriage Upgrade] system!

[Consuming 10 "Iron Ingots" transforms carriage number 2 into a "Simple Plantation"!]

[Consumes 5 "Monster Cores" to install an "Electromagnetic Defense Network" in carriage number 3!]

[Consuming 1 "Rare Blueprint" unlocks the S-class carriage "Mobile Operating Room"!]

Outside the car, there are man-eating monsters and the darkness of human nature.

Inside the car, Zhou Yang and dozens of gentle nurses were eating hot pot around an induction cooker.

"Brother Zhou Yang, today's vegetable salad is delicious!"

"Zhou Yang, this is a stamina recovery potion I just mixed. Drink it quickly."

"Sir stationmaster, do you... do you still require personal care services?"