Little Solita knows her mother left many days ago and does not know if she is coming back. To deal with her fears, the little girl finds refuge in her bedroom at night. She lets her imagination go beyond her window in search of hope and understanding.

Solita discovers a smiling moon as purple as her favorite color. With the maternal instinct of a mother and the cleverness of a teacher, the moon becomes comforting and playful devoting precious time to the lonely child. One night Purple Moon takes the little girl on a trip to show her the beauty of her country making time go by faster.

The book is written in English and Spanish using a simple and poetic style to describe the feelings of a child who misses her mother and creates an imaginary friendship that touches our hearts.