Sam Lorde (Scott Adkins), a seasoned sniper-for-hire, begins the film struggling with guilt after accidentally killing an innocent woman during a mission. Disillusioned, he decides to retire—only to be coerced into one final job in a luxurious penthouse in Frankfurt alongside his spotter Ken (Jack Parr)
Inside the almost entirely glass-walled suite, Sam grows increasingly uneasy. Soon enough, a hidden assassin and a sniper stationed across the street open fire, trapping Sam, Ken, and two masseuses, Mona and Lily, with virtually no cover