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After special forces instructor Jiang Chen led his team members to perform a mission on the snowy plateau, he unexpectedly discovered that he was no longer in the original world, and the team members were missing, including his sweetheart Xue Yan. In order to return to the original world, he followed the system's prompts and started working as a delivery boy. This not completely unfamiliar world has many secrets, such as the female warrior Wei Si who can attract the attention of a mysterious organization. In order to find the way back, a big adventure begins with reuniting with her lover...