Mike is a 10-year-old Alaskan boy who discovers a lynx while on a fishing trip with his father. Mike names the lynx Kitty. His father doesn't want to take the little lynx in at first, until they find out that Kitty's mother and sister have been crushed by a fallen tree. Mike is excited to have Kitty and can't wait to have an adventure with him. As it turns out, he doesn't have to wait long! Immediately after returning home with Kitty, the two find themselves saving a girl's life! When Mike and Kitty retire to the woods for a campout, they save three lost kids. It seems like the excitement will never stop! Soon Mike takes Kitty with him and his father on another fishing trip. Kitty wanders off as usual, but this time, he doesn't come back. Mike's father doesn't want to wait any longer, so Mike is forced to leave Kitty behind. Mike grows up and marries. He learns to fly a plane and continues to enjoy the beautiful Alaskan wilderness he and Kitty used to love to explore together. One day, Mike flies his plane to an island to rest the engine. A rustle in the bushes . . . then . . . Kitty! Kitty limps toward his friend, gray-furred and worn. His paw has been severely injured, and he is dying. Mike says good-bye to his old friend Kitty, and then Kitty passes away. Mike builds a grave for his friend, and then flies home-to be greeted by a new plane, named Kitty'a present from his wife! Mike will never forget his beloved friend, the lynx named Kitty.