'Peg leg' means prosthetic leg, We talk about the 'peg leg' that we support when we walk our own path. 

With the motif of the sentence "Fearless Face in the Fog," 

it contains a calm and enterprising atmosphere to move forward without fear amid uncertainty.

It is created at some point between darkness and light.  

From the moment you're immersed in something deep at night to the moment you're facing the early morning,

In the moment we open the door and move forward in fear and confusion, 

The moment when we meet the dawn from deep agony and anguish feels like a long tunnel, 

It's time for "PEG LEG".