Amoeba Music

In Korean with English subtitles.

A former motorcycle gang member, Gi-su now earns his living as a bike messenger. One day after making a delivery to an office building, he witness the building blow up. Never suspecting he could have anything to do with the disaster, he moves on to his next job - which involves escorting a girl group singer, A-rom, to a TV station. As she puts his helmet on, a timer mechanism is triggered and a countdown clock appears. Gi-su gets a call from a stranger telling him that the helmet is booby-trapped and will blow up if he fails to make a series of deliveries within a fixed time limit. With the police hot on his trail, he races to complete the deliveries and stop the timer on the helmet.