Mainline DHT questions

So, what does a Bittorrent DHT node actually store? Say I have a hash for a file. I find the node responsible for that hash, what does it have? What do I ask for? What is the flow?

So, I find the node responsible for that hash. The first thing I am going to get from that node will be the file metadata, right? Name of the file, and a hash tree. Is that correct? Then I take those hashes, and query the responsible nodes for each chunk of data. Is that correct?

bittorrent/torrent protocol specification is available online