When the girl of your dreams is half your age, it's time to grow up.

After weeks of traveling through Europe, the immature William finds himself in Copenhagen, the place of his father’s birth. He befriends the youthful Effy, who works in William’s hotel as part of an internship program, and they set off to find William’s last living relative. Effy’s mix of youthful exuberance and wisdom challenges William unlike any woman ever has. As the attraction builds, he must come to grips with destabilizing elements of his family’s sordid past.