For as long as Madeleine "Mad" Rousseau can remember, she's been the
"sweet" twin to her sister Jax's "sassy." But after an especially
painful break-up, Mad decides she's had enough of being sweet.
Children's librarian during the day, she begins visiting Philly's
seedier nightspots on a quest for fun, experience, and just a taste of
danger.
When Cortlandt "Cort" Ambler, the ex-boyfriend of Mad's sister, Jax,
saves her from disaster on one such evening, an unlikely friendship is
born between the rebellious librarian and the moonlighting pianist...and
two broken hearts begin a journey toward being whole again.