May and her brother are inseparable as children. When May becomes an adolescent, she can't seem to let go of memories of her childhood, which seem to sustain her in her cold, loveless middle class home in Diamond Hill.

The film is set in the now-demolished Tai Hom Village in Diamond Hill, Hong Kong. The title "Diamond Hill" poses the question - can one truly find "diamonds" there? The director uses this as a metaphor to satirize the class phenomenon in real society. The story unfolds from multiple perspectives, depicting the familial relationship between May and her brother. It then extends to various characters from May's perspective - her foster father, her sick foster mother, a thief, a policeman, and her elder brother. At first glance, these characters seem unrelated, but May gradually draws them closer together. May's longing for her brother and her secret create a suspenseful atmosphere. The blend of reality and fantasy fills the film with elements of suspense, dark humor, and absurdity.—todayscreening