Kate has her vacation to Prague all planned out, but forgets her travel guide at the airport. Jackson discovers it and starts leaving notes for Kate in the places that she’s circled as must-see. Despite her initial trepidation, Kate starts leaving notes for Jackson, and they play a game of hide-and-seek across the city. Their game culminates in a planned rendezvous at the Astronomical Clock, but the massive crowd keeps them from each other. Alone on the plane at the end of her trip, Kate feels that she’s missed out on something important - but a moment of serendipity changes her life forever.