Ji-han, suddenly swept ashore on an uninhabited island, encounters Rockfish (?), a man who had been stranded there before, now with amnesia. "Jihan, you like me too, right? You'll stay here with me." What should I do with this unresponsive man in a peculiar mask and underwear, attempting to build a love nest on this remote island instead of escaping?! A love story unfolds on Goat Island, the black goat island!+