Jin Tian (
Wang Likun) is a young woman who recently got dumped by her fiancé and lost her grandmother, Chen Lanxin (
Xu Jinglei). Feeling heartbroken, she enrolls in a language course abroad and travels to
Prague for a change of pace, the city where her grandmother once spent a couple years of her life. In her grandmother's belongings, she finds a letter from 1970, written by Josef Novak, her grandmother's past lover. In Prague, Jin Tian meets Peng Zeyang (
Kris Wu), a young single father who lives with his little daughter and
bipolar mother. The two develop a mutual attraction during their journey searching for Josef Novak. ==Cast==