A few weeks into his European journey, William, an American who is still quite immature, finds himself at a crossroads in Copenhagen. It's not just another European city for the 28-year-old, as the Danish metropolis is also the birthplace of his father. When he befriends Effy, a young woman half his age, the two embark on an adventure together: to find William's grandfather. Their mix of youthful exuberance, exuberance, and precocious wisdom draw William in and challenge him like no other woman has before. In their adventures together, they grow closer, and as William commits to someone for the first time in his life, he must finally confront his family's past, for dark secrets lurk within....