Attrayant

Hey all I have an 86 300zx. I drove it down to the store a short distance from my house, parked it, pulled the e-brake up, came back out and started driving down the road. About halfway down the street I noticed it wasn't accelerating very fast. I let off the gas and it started to slow down, fast. Not like engine braking, but like actual brakes, even though I wasn't on the brake pedal. Acceleration was very slow, I pulled over and could distincively smell brake pads, you know, like when you brake really hard, coming from the back and I could see small wisps of brake smoke, also like when you lock them up. I got back in and started back towards my house, car was still dragging and I could smell brakes from the rear very clearly and see alittle bit of smoke coming from them. Also, when I got down the road alitttle bit, I pulled up hard on the ebrake to see if it would make a difference, and it didn't. Could something be stuck? Fluid maybe? I haven't checked anything, this just happend tonight. The car did sat undriven for approx. nine months, but I have been driving it in the past week or so. I did not seem to have any problems with the front brakes nor was there any smell or smoke coming from them. Any help greatly apprechiated!