Lin Jiushi finds himself inexplicably thrust inside a mind-bending reality dictated by an enigmatic VR game where he must pass twelve doors to escape. The catch? Each door initiates new mysteries to solve and conditions to abide by.

VR game designer Ling Jiushi, frustrated with his work, decides to resign. However, a beta test game provides him solace and distraction. Unexpectedly, he receives a game disc from overseas. Following an accident, he finds himself in a corridor with twelve iron doors. Inside one door of this strange place, a mysterious figure helps Ling Jiushi escape from the perils of the snowy mountains, welcoming him to the world beyond the doors. Within the doors lie grave dangers where a single misstep could cost him his life. Ling Jiushi soon discovers a chilling truth: peril encountered within the doors can also affect him in the outside world, making his journey through this mysterious realm even more treacherous.—ChineseDrama.Info