It's summer vacation, and Hello Kitty is excited to go to camp for the first time. She packs all the things she'll need, like her teddy bear, a flashlight, and her diary, and heads off for a summer of fun! At camp, Hello Kitty does so many fun things—she swims, makes lemonade, plays games, has campfires, and goes on adventures. Even though she's having a great time, Hello Kitty misses Mama. Each day she sits down to write Mama a letter to let her know about all the fun things she's doing. Just as she's starting to get homesick, though, Mama has a surprise for Hello Kitty that makes her feel right at home.