On the independent Flame Island in the sea, firebirds live in harmony with the island residents.
And the ten-year-old Garen, who lives on the island, has always been troubled by his grandfather's insidiousness, hiding his knife in his smile, and his sister Garen's stubbornness and competitiveness, but he never thought that he would be separated from them one day. But now he appears inexplicably in Tianyuan Mansion, which is definitely not on Fire Island. Not only is he depressed, but the most important thing is that this guy looks the same as him. Who is this guy who claims to be his twin brother! ! !