When Briana's father dies of a heart attack, she feels a new heart grow inside her body. Through this heart, her father's voice speaks to her. It guides Briana through her grief as well as her new, not-so-normal life at home. When her mother's own grief becomes debilitating, Briana feels like she's solely responsible for her autistic little brother, Aaron. As she begins to spend much of her time and energy caring for Aaron, she begins to wonder: did his special needs hurt her father's very fragile heart? The voice of Briana's 'new heart' helps her to navigate the messy uncertainties, as she balances her first feelings of romance, making new friends, and following her dream of writing for the school newspaper. And as Briana finds strength and knowledge in herself, she's finally able to let go of her new heart and rely solely on her own.