Basically, it goes like this:
They all go to the mall to buy the big screen TV. George drives his dad's car. They can't find parking, and Kramer talks George into taking the handicapped spot. They go buy the TV, and come back to find an ambulance and an angry mob near the car; apparently a woman in a wheelchair had to park in a regular spot, and she couldn't get up the ramp, resulting in a wheelchair accident, requiring her hospitalization. The mob was waiting for the owner of the car to return so he wouldn't get away with parking in a handicapped spot. None of them let on that the car was theirs (George's) and so they went back to the mall and had coffee for awhile. When they came back the mob was gone, but the car had been trashed completely. . .
Kramer visits the handicapped woman in the hospital and "falls in love with her." He talks George into buying a new wheelchair for her since hers was damaged. They of course end up buying a really cheap one. . .
George's father was in the middle of receiving an award from an organization he worked with helping the handicapped when the cops show up to arrest him for parking in a handicapped spot! . . .
The handicapped woman is briefly shown in her "new" wheelchair from Kramer and George, and of course the brakes go out while she's going down a hill and she ends up injured again. . .
The TV is given to the Drake & fiancee, engagement breaks up, and the Drake let the fiancee keep the TV. She donated it to charity (the same organization George's father worked for). Mr. Costanza makes George and Kramer pick up the donated TV at the Drake's apartment and deliver it to, you guessed it the wheelchair woman!
This is to the best of my knowledge, I might be off a bit here and there. I'm sure there are others who have memorized it chapter and verse. I think this was the first Seinfeld I remember seeing too, oddly enough!
-Kathy