PoW #8 - Subplots

Subplots are what give stories  layers, depth. They are secondary 'stories' to your main overall story. They make your story more interesting. Maybe subplots offer some lightness to a serious main story arc, or they might explore a minor character. Adding depth to a story with subplot is sometimes difficult.

Since I am in the planning stages - fleshing out the world and characters of my next upcoming novel, The Clockwork Universe, ( which I was able to do a bit more in my short story, Ex Cineribus Resurge in the www.WriteForJapan.com short story anthology) I have a few ideas of possible subplots for TCU. I've put them as this weeks Poll of the Week! so please vote! And do you have any other suggestions? if so, write them in the comments! (read the synopsis of TCU to get an idea of what it is about).

Please vote below!
What should my subplot be?(surveys)