Until this summer, Becky thought she knew everything about her family. But when she and her mother move to the small town of Oakbridge, Becky accidentally finds a box with old family photographs. One of them shows a mother holding a little girl in a pink blanket, and the date is written on the back. And this baby is definitely not Becky... Becky runs to the Butterfly Garden to tell her new friend Rose-May about the discovery, but she acts like she doesn't care. From this moment on, the number of secrets and oddities only multiplies, and Becky thinks that Rose-May is also hiding something from her, like her mother. And very soon it turns out that these fears are not in vain...