Piper Callahan is a “good girl.” A world-class violinist, she’s spent her life smoothing over the cracks in her family and, more recently, molding herself into the perfect accessory for her controlling fiancé. But on the eve of her wedding, her unwavering composure begins to crumble. Facing a future that feels more like a prison sentence than a partnership, Piper makes a choice that no one expected: she runs. Waiting at the bottom of the church steps is Griffin Hayes—her brother’s best friend and the man who has been her self-appointed protector since they were children. Griffin is a man of logic and steel, an engineer who likes things that make sense. He knows Piper is making a mess, but he also knows she’s finally breathing. As they trade the wedding aisle for the open road of the California coast, Piper must confront the years she spent shrinking herself to fit someone else's mold. Between cheap motels, roadside diners, and the quiet intimacy of Griffin’s black Camaro, the lines between old friends and something more begin to blur.