Cheng Ngai-Bong

A man with plans to propose to his girlfriend hides an engagement ring in the ancient underwater ruins off Japan's Yonaguni Island. When he goes missing she must investigate and remember what happened.

One day Pak, a taxi driver who refuses to retire, meets Hoi, a retired single father, in a park. Although both are secretly gay, they are proud of the families they have created through hard work and determination. Yet in that brief initial encounter, something is unleashed in them which had been suppressed for so many years. As both men recount and recall their personal histories, they also contemplate a possible future together.

When a terrorist who specializes in explosives takes hold of an underground tunnel, he threatens to kill hostages if his demands are not met.