作家余家聰受夢境纏擾，到神聖幾何求助；哲學學生家聰走進大澳，重遇兒時摯友。
In this space-time, Ka Chung is an author who has no memory of Yeesa. However, he constantly has dreams of a girl and he decides to turn his dreams into a novel. He asks Yeesa to be the illustrator of the novel, to which she agrees, wanting to know more about the story. Meanwhile, in another space-time, Ka Chung receives help from Lam Co Ying to get the only photo he has of his mom back from the scammers.
