The young officer is transferred to the capital where he is supposed to be under 24/7 control of the Emperor's people as a sign of loyalty towards his mutinous father. It's ironic that the young officer is convoyed by his Childhood friend, Lin. Now she's serving as one of the Emperor's guardian and each mission will be valuable for her career. However first, these two have to get over the Mountain Pass and here is a rumor stating the mystical things happen in that place.

[From itch.io]