After his father abandons the family, Autumn Moon drops out of high school and becomes a debt collector for the Triads. On his rounds, he meets and falls in love with Ping, a daughter of one of the Triads' clients. She is suffering from a fatal kidney disease, and to pay for her medical expenses, Autumn Moon takes an assassination contract, but as he slips deeper into the criminal underworld, he's haunted by a figure from his past.
Plainclothes policemen Brian and Mike use an elderly woman's apartment for surveillance, hoping to catch a fugitive gangster. They develop a warm relationship with their hostess, whom they call "granny." Meanwhile, each man develops a romantic relationship: Brian with a strange wandering teenage girl, and Mike with a pregnant woman at the dry cleaning shop. When the gangster returns to his flat, Brian and Mike are forced into an explosive confrontation.
A hired killer pairs up with an amateur filmmaker to provide clients with satisfying footage of enemies getting whacked.