Kika has just been adopted -- and she's worried. There's so much that's new to her: a different language, new friends to make, and something she's never had before -- a family.

Melissa has a new sister -- and she's excited. There's so much to share with Kika: trips to the playground, afternoons at the library, and birthday parties.

Through each new experience, Kika and Melissa discover that sisterhood can be fun, challenging, and sometimes unpredictable, but always rewarding. Best of all, a sister is a friend for life.