Twenty-three years ago, he hopped on a bus to pursue his dreams in the music business. But that meant leaving behind the girl who could never really be his.

Now older, wiser, and insanely successful, Mick Tyler has achieved everything he ever wanted, but he’s never been more miserable. Feeling a little disenchanted and introspective, Mick can’t help but let his mind wander through all of life’s “what if” moments. The biggest what if? The girl he walked away from—the one who was too young and had dreams of her own. And now that he’s thought about her once, he can’t stop wondering.

Sienna Ashley is desperate for a little excitement. As thrilling and satisfying as her pursuit of scientific research has been for her intellect, it’s left her heart feeling a little neglected. For years she dreamed of finding someone who not only understood her brains but accepted her and all her quirks. Once upon a time she thought she’d found that someone, but it’s been over two decades since he walked out of her life.

Past and present collide when Mick and Sienna unexpectedly come face to face. Together, they decide to see what could have happened had they chosen a different path all those years ago. But they’ve given themselves a deadline—two weeks—two glorious weeks to either work each other out of their systems or to embark on the love of a lifetime.