Adapted from Kawamura Genki's popular novel, psychiatrist Fujishiro (Takeru Sato) is preparing for his wedding, and his lover Haru (Nana Mori) from 10 years ago sends him letters filled with memories of their first love from Bolivia, Czech Republic, and Iceland. At this time, his fiancée Yayoi (Masami Nagasawa) suddenly disappears, and Fujishiro begins to search for the truth about his beloved.