Some girl is holding a gun, she talks about some guy who loves her.
Then we see some joint police/narcotics operation where one of those guys gets some chemical thrown in his face.
Then two cops pick up a guy who's released from jail. The guy, Victor, knows one of the cops, Alex. After a stop for some reason at the cop station, Victor goes to some seedy part of Geneva where he meets with some bad guys. He's offered a room in a whorehouse/club to stay, after he shows he's loyal to the main bad guy, Ceku, by beating up some hooker. He also gets a job delivering drugs.
Now we learn about Alex. He's applying for and being promised a job with narcotics. He's a bit impulsive and botches operations because of it. One of Ceku's whores is an informant. During the next operation a cop gets killed because the police and narcotics bosses can't agree on whether to intercept some drug deal. Alex is divorced, has a troubled teen daughter who does drugs and hangs out with the wrong crowd. And we learn that his wife is sleeping with Victor!
Turns out that Victor was a cop but at some point killed a girl so he ended up in jail. He was Alex's partner and childhood friend. Alex saves his life at some point. Alex had a brother who also hung out with Victor and Alex but he died young.
Near the end there are several twists in this family/friend drama as Alex tries to take down Ceku and resolve things with Victor once and for all. In flashbacks we learn how Victor killed the girl and he tells Alex some truths about the death of his brother.
Verso is a poor and ugly movie. The themes and violence are pretty unpleasant and so are the people--both the characters and the actors. There is plenty of story here but the director is completely clueless how to make a decent movie out of it. There was potential here for an interesting action drama thriller but this director manages to make out of all this a boring movie that in the last minutes goes nuts with the twists. But by then it was too late. And what does the girl in the intro have to do with anything? We never learn. Verso is a royally wasted opportunity.