I'm convinced you dreamt this entire concept some night and then went ahead and made a story out of it.
I'm still waiting for one of the characters to awake and realize that this has all been a dream.
It's a testament of your incredible imagination the way you have fused the supernatural with the Star Trek universe. It's not a bad fit at all.
But have we just reached the abrupt end of this lost crew and their Captain who dared to make a deal with the devil?