Dilly finds herself in a whirlwind of emotions as she navigates the arrival of her baby brother, Matthew. With the gift of a diary, she embarks on a journey of self-discovery, capturing her thoughts and feelings about this new addition to the family. Through her heartfelt entries, Dilly expresses the joys, frustrations, and evolving dynamics that come with being a big sister.
As she chronicles her experiences, the diary becomes a safe haven for Dilly, allowing her to explore her thoughts on love, attention, and sibling rivalry. With each page, she learns the importance of sharing, growing, and embracing her new role, all while forging a special bond with Matthew.