A possible concise summary is:
Two friends, Ishmael and Gunk, play a survival game on a raft in the ocean. They encounter various challenges and dangers, such as a shark, a boar, a bird, and hunger. They also have some humorous moments, such as finding a dragon, making a streamer chair, and singing country roads. At the end, Ishmael falls in love with the bird and leaves Gunk alone on the raft. Gunk sings a sad song and dies.
1. Mikhail Gorbachev was the last Soviet leader of Russia.
2. Gunk is the son of Mikhail Gorbachev.
3. Gunk and Ishmael are stranded on a raft in the ocean.
4. The two have limited food and water.
5. They encounter a shark, which they name Clive.
6. Gunk has a passion for collecting plastic.
7. Ishmael and Gunk have different personalities and often clash.
8. They meet a bird that drops rocks on them.
9. Gunk imagines a dragon, but it's not confirmed if it's real or not.
10. They encounter a goat, which is friendly.
11. The duo loses some of their belongings, including a research table.
12. Ishmael leaves Gunk on the island to sail away.
13. Gunk is left alone and finds a chair.
14. Ishmael returns and says he is in love with a bird named Gregna.
15. Ishmael leaves Gunk again to be with Gregna.
16. Gunk is left alone once more and appears to have died.
17. Gunk says his final goodbye.