I cant see the background with this.
If that is indeed a background image, you can set it draw under or over everything, in your case it is currently set to draw behind everything, to change that, Press N while in 3D view, and scroll down to background images, you will find two buttons, one labeled Back, and the other Front, by default it is set to Back:
We want to change that to Front, like so:
Hit the Z key to activate wireframe mode and then disable faces in the mesh display tab under the right sidebar (wich you can open by hitting N)
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$\begingroup$ i just printed this way to show what im talking about, cuz i was editing on wireframe mode, but still hard to edit this way. $\endgroup$ – DarlesLSF Jan 2 '17 at 1:20