The following synopsis is from James Williamson's own catalogue, which helpfully fills in some of the dialogue (the film itself contains no titles):

Scene showing two rooms and two telephones. Gentleman comes in rings up: "Are you there?" "Yes, dear." "Is the old man in?" "No, dear." (Old man listening behind girl). "Can you come round and see me?" "Yes, I'll come round." Hangs up telephone and goes out without seeing old man behind, who catches hold of telephone and listens. Gentleman at other telephone goes on giving girl directions how to come; old man in a towering rage takes the information and uses it to find the next scene, which shows the young gentleman sitting in joyful expectation of his lady love's arrival; he is considerably perturbed when the old man arrives instead and makes effective use of his umbrella.