Mia Templeton is dying. Or was dying. After receiving a heart transplant, her world is forever altered. Before her eyes open, she overhears her donor was a murdered girl of the same age. Whispers invade Mia's head before she's even left the recovery room. She develops tastes for foods she once hated, and dreams so vivid, she feels they're someone else's memories. Her personality is altered—once a quiet doormat, she's now inexplicably flippant, and confident. And her unexplained longing for the new boy at school is borderline obsessive.

Morgan Kelley is new. Adopted by his aunt, a descendant of Louisa May Alcott (Little Women), he's thrown into life at a new high school, and as a historical guide for his aunt's store—a homage to all things Alcott. Conspiracy theories abound about his mangled lower leg—but no-one has been brave enough to ask. Till Mia.

Something is awry with the Underground Railroad tunnels beneath his aunt's home. Mia and Morgan enter the world of a secret Literary Society—and are drafted to help bring a rogue Literary giant to justice, solve the mystery of her heart donor, the the real fate of Beth from Little Women.