Twelve-year-old Finn awakens with an extraordinary gift: he can understand and speak with all animals. When a talking cat reveals that Finn possesses the legendary "Old Tongue," he embarks on a magical quest alongside a griffin, wolf, ghost mammoth, and other mystical creatures. Their mission: restore the Great Sanctuary, an ancient refuge where all species once lived in harmony. After facing riddles, mazes, and dragons, Finn activates the sanctuary's crystal heart with pure intention rather than magic words. The sanctuary rebuilds itself into a perfect haven for every creature—extinct, endangered, and legendary—giving them all a safe home forever.