A boy named Yueyue lives in a small Chinese town around 1930 and refuses to accept that his mother is gone. He holds on to a promise she once made him: that she would come back for him. Believing she is still out there, he sets off to find her. The times around him are turbulent and unsettled, but his hope does not waver. The story is a one-episode drama about a child's search for his mother, set against a restless period in China's past.