The song is about a couple escaping slavery via the Underground Railroad.
Wait for darkness, case the light
Gonna leave here late tonight
Hush now baby don't you make a sound
Tell all my friends that I'm going underground
Going Underground I'm going underground
There's an old farmhouse I used to know
Been abandoned since the last snow
Maybe they left a little food around
Tell all my friends that I'm going underground
t be found
Be my lover, be my friend
Stay with me until the bitter end
Move through the shadows so we can't be found
Tell all my friends that I'm going underground