Narcotics officer Shaolun (Tony Leung Ka Fai), in order to bring down the local drug kingpin King (Michael Wong), forces a female street thug with an equally sketchy past, Coco (Rosamund Kwan) to infiltrate King's organization and provide information. What no one expected was for both men to fall for Coco, and Coco for King.

The world's ten most influential scientists are being mysteriously killed, one by one, spontaneously combusted, microwaved to death, or otherwise. Another scientist, software prodigy Dr. Ken, searches for clues to these bizarre happenings only to see his fiancee apparently return from the dead. As indications point to the end of the world, It appears that Dr. Ken may be the only one who can save humanity.

Despite negative psychological evaluations, Mike Wong is assigned as the captain of the SDU, a special task force linked to the Customs Department. Their mission: apprehend nasty drug dealers, led by the “Ice Queen.” To do this, Mike has to team up with customs cop Minnie. Despite their clashes, the two learn to understand each other, but not before things get bad.

Financially troubled, a newbie hitman reluctantly takes the job of finding the plotted killer of a Japanese tycoon.