RHK

I've got an 06 v6 5 speed. Last night while driving, the clutch went all the way to the floor. I'm leaking fluid; master cylinder is empty a few minutes after I fill it to the top. I thought I could top it off, and limp home to get it in the shop, but even when I fill it, the pedal never gets any pressure, even pumping it several times.

Is there a clutch slave cylinder somewhere? I just got the thing home, not sure where to start. It's not leaking at the pedal or the master cylinder, somewhere deeper down by the engine/trans. Any advice is greatly appreciated.