Former Hong Kong gangster Roy returns home after three decades of exile in Brazil, hoping to settle some unfinished business before he dies. Affected by Alzheimer's disease, he hires young thug Smokey to act as his guide and helper as he searches for the man who put a bullet in him and stole the love of his life. Traveling through the Hong Kong underworld together, the two men form a close bond as they discuss their idealized loves and missed opportunities.

Nicholas Tse Ting-Fung
as Smokey

Eric Tsang Chi-Wai
as Roy 'Mountain Leopard'

Shu Qi
as Ah Nam

Kelly Chen
as Policewoman

Sandra Ng Kwan-Yu
as Third Sister

Anthony Wong Chau-Sang
as Brother Kei

Terence Yin Chi-Wai
as Brother Chai

Stephen Fung
as Mountain Leopard in '70

Sam Lee
as Nine Dragons in '70

Tony Ho
as Mad Dog Wah in '70