The movie comes at you fast with a lot of major plot points in the beginning.
The film opens with a Ukrainian wedding scene. Waiters are getting patted down. One waiter (Jean-Claude Van Damme), skilled in knives, cuts the throat of the big boss and escapes to his secret apartment...meanwhile another assassin, Flint lives in seclusion caring for his comatose wife (Bianca Van Varenberg).
Also going on is a quick scene involving an Interpol corruption scandal and an investigation. Seems Interpol is selling guns that they seize back to the criminals. They are afraid that Flint(Scott Adkins) can take them down, so they order his assassination. In order to flush him out they release a crime boss named Polo (Ivan Kaye) from prison, who had gang raped and beat Flint's wife comatose. In addition to Flint, Jean-Claude Van Damme is also summoned to do the Polo assassination. Polo is hunting the man who killed his brother in the first scene.
Now if this wasn't enough, Van Damme is distracted by his new neighbors, a prostitute (Marija Karan) and a pimp who beats her. Van Damme doesn't want Flint to kill Polo or else he loses his fee. Flint realizes Interpol set him up by freeing Polo, so he wants to kill them too. Everybody in the film is out to kill everybody else. Got all that?
Unlikely alliances form to narrow down the factions. Outside of Van Damme, the acting was acceptable. While the plot sounds complex, it really isn't that hard to follow, unless you have problems following Steven Seagal movies. It takes a while to build up all the factions and reasons for wanting to kill each other, but once it does things move rather quickly.
F-bomb (with Ukrainian accent), violence against women (its a Van Damme film), brief nudity, torture.