Umm, spoilers(from what I saw, I stumbled in about 20:00 in, plus my audio was $#@#ed so I missed some of the dialog)
Archer is in negotiations(sp?) with an alien ship for a warp coil.
BTW, Enterprise is blown all the way to hell.
:adverts:
We come back and T'Pol is in the shower ;7
Then Trip come in behind her and they start making out/pawing each other/ect. She throws him against the wall and is being very Klingon about the whole thing. Suddenly she is transformed into a nastified version of herself and starts attacking Trip, just as she gets her hands around his throat...she wakes up, it was a dream. T'Pol is gasping and acting like she's in distress. Then she staggers out into the corridor and gets into a space suit and goes to the cargo bay, E Deck is open to space apparently. In the cargo bay, she discovers the ladder is broken so she tries to get down via some handy crates. She falls and disconnects one of her air hoses, she flairs around and gets it connected just before she loses consciousness. T'Pol then digs through the debris and finds a sample case with what turns out to be some of that nasty mineral that helps take the edge off the anomalies. She takes it to a science lab, liquidates it and injects it into her vein. She's addicted to it, as it helps moderate the powerful emotions that Vulcan's keep buried by intense meditation and conscious effort, allowing her to interact with the crew more easily. She eventually takes the problem to Phlox and all is well. Meanwhile, they discover a set of coordinates and a stardate in an encoded message from Degra. The coordinates are 4 LY away so they'll need to sustain Warp 3 to get there by the stardate, which forces a difficult decision on Archer, Enterprise's own warp engines are fried and need a new warp coil to be made to work again. So Archer, who is becoming quite the anti-hero, decides to take from the aliens at the beginning of the show. There is some drama and rationalization about ethics and then they do it. The last scene show's Enterprise going to warp and then to black.
That's a fairly total summary. Hope it helps. Remember, UPN repeats Enterprise at 7:00pm CT on Sunday nights.