Luo Feng awakens in the fragmented underworld of Belobog, only to discover he has transmigrated into the world of Honkai: Star Rail. Before he can fully process his new reality, a mysterious mechanical voice invites him to the 'Teyvat Continent Forum,' bridging two distinct gaming universes. Granted control over a unique version of the Astral Express capable of traversing dimensions, Luo Feng realizes his potential to connect the desperate people of Belobog with the vibrant world of Genshin Impact.

Facing severe supply shortages in the underground city, he leverages his interdimensional train to transport essential goods from Teyvat, earning the skepticism of locals like Natasha and Seele. However, his ambitions extend beyond mere logistics; Luo Feng aims to establish a travel agency that introduces Teyvat's inhabitants to the concept of 'Paths,' fundamentally altering their destiny. His journey takes a chaotic turn when his maiden voyage to Mondstadt results in an accidental collision with the legendary Stormterror, thrusting him directly into the conflict between the Anemo Archon and the corrupted dragon.

Now, acting as a guide between worlds, Luo Feng must navigate political intrigues, monstrous threats, and the bewildered reactions of heroes from both realms.