Here's Section 10: The Red Convertible (1974). Yeah, these sections are kind of like chapters, right?
Now we're inside Lyman Lamartine's mind. It seems that he and his brother Henry had owned a car together before Henry went off to war.
Lyman reminisces about life with Henry before he left… and then life after he returned from Vietnam. Apparently, Henry came back quite different.
In a ruse to get his brother interested in something, Lyman ended up banging up their mutually owned car. The plan worked: he managed to get Henry interested in working on the repairs.
Once the car was fixed, they took it out together. They seemed to have a nice time and ended up talking a bit.
Then, Henry decided to go jump in the river near where they had been sitting. And then suddenly he was gone.
Lyman went in after him, but apparently Henry was nowhere to be found. So, Lyman put the car in the water.