When their parents, a screenwriter and a film editor, go off on summer projects, Marigold, twelve, Zinnia, eleven, and Lily, five, must visit their Great Aunt Sunny in Cape Cod, where they learn much about themselves and each other and grow closer than ever.

When their parents, a screenwriter and a film editor, go off on summer projects, Marigold, twelve, Zinnia, eleven, and Lily, five, must visit their Great Aunt Sunny in Cape Cod, where they learn much about themselves and each other and grow closer than ever.