Jack Caine (Dolph Lundgren) is a cop who’s taken it upon himself to end the Houston drugs trade and take out its notorious chief supplier. Following a series of grim murders, Caine and his F.B.I. accomplice must track down a ruthless alien fugitive who forcibly overdoses his victims with heroin in order to siphon off the endorphins it produces in the human brain, a narcotic illegal on his own planet. Already a hardened law enforcement officer, Caine is used to fighting the toughest of criminals; but up to now they’ve all been human…