Plot-wise, there isn't too much going on in this poem. We meet a speaker, though, and this guy wants some answers. Specifically, he's asking us to answer four questions for him:
1) Are roses naked?
2) Why do trees hide their roots?
3) Who can hear a thieving car's regrets?
4) What could possibly be sadder than a train in the rain?
And with that, he peaces out. Is he looking for actual answers, or is he just leaving passing this out as food for thought? You be the judge, Shmoopers.