A pair of brothers, the elder brother is a doctoral student, the thesis is still in progress, he is middle-aged but has not yet entered the society; the younger brother is a weatherman who appears in the TV news every day, although he is gay, he adapts well to the society and leads a good and stable life for the middle class. Brothers are drifting apart because of their different life choices. "catching the Moon" refers to the process of two people from having no intersection and blaming each other's life to gradually get to know each other and reconcile. The two men's common memories of their mother and landing on the moon have become an invisible bridge between the two.