Hallie moves to Paris to reinvent herself, find a new life, and maybe a new love.

She's off to a fair start, she's landed a bartending job at a dive called Millie's and found new friends in the eccentric crew that runs the place. Then, it gets weird. There's a strange woman who won't leave her alone. Garbled warnings from bizarre creatures disrupt her sleep. She keeps running into a man with a charming smile—a man she should probably steer clear of. And she can't stop falling back in time in Millie's keg room.

Soon, Hallie is caught up in something much bigger than herself—a project that this mystery man needs her to join. But with every trip through time, Hallie loses a little of herself, and each infinitesimal change she makes ripples through Paris, until the future she's trying to save suddenly looks nothing like what she hoped for...