Roper, a hostage negotiator catches a murderous bank robber after a blown heist. The bank robber escapes and immediately goes after the man who put him behind bars. The ending is played out with Roper and his partner McCall attempting to rescue Roper's kidnapped girlfriend. A major element in the plot is the relationship between Roper and his girlfriend.
Based on the Marvel Comic, Dolph Lundgren is Frank Castle an ex-cop who lives in the sewers and acts as judge, jury, and executioner to the city's criminals in retaliation for the unpunished murders of his wife and kids.