Su Nan, a miserable girl who has grown up in the mud, is a patient with invisible depression. She is about to become a leftover girl. She marries for the sake of marriage. She marries an honest and shameless bastard. During the days of despair, she encounters a smart and sensible little black cat and takes it as her spiritual sustenance. Unexpectedly, the black cat was snatched away by his mother and disappeared...
Idea: What does invisible depression look like in daily life?