Bay Kennish is an artistic teenage girl who grew up in a wealthy home, raised by her stay-at-home mother pro-baseball player father. After testing her blood type in a class at school, she discovers that it does not match her parents. Genetic testing confirms this, and the family comes to learn that Bay was mistakenly switched at birth with another newborn girl at the hospital.

This other girl is Daphne, a teenager living with her single mother in a working class neighborhood. She is also deaf and attends a special school for the hard of hearing.

When the families meet, the girls discover that there are certain aspects of their lives that identify more with their biological parents. Both families now struggle to learn how to live together for their daughters' sake.