The protagonist is a secret agent / spy and meets the girl somewhere. The hero is chased by gangs everywhere he lands up and the girl is also targeted by virtue of being with him. Girl goes hysterical at being chased and shot at and protagonist pumps a bunch of drugs into her to make her calm down... and then goes on the run with her. A good part of the movie is depicted in glimpses of different places (new one each time) that the girl sees, whenever she's coming round and then gets pumped with more drugs.
Eventually, tables turn and she ends up saving the protagonist and while whisking him away gives him a dose of the same.