Live For Films reports the plots:
Operation: Endgame centers around two rival teams of government assassins, who work out of a top-secret underground facility and use code names from the Tarot deck. When new hire “The Fool” (Joe Anderson) joins the group, he arrives for his first day only to discover that the boss has been murdered and the office has been locked down and turned into a ticking time bomb. He must survive his ambitious co-workers, find the killer, and discover a way out before the whole place explodes.
Directed by Fouad Mikati and written by Sam Levinson. It stars Joe Anderson, Rob Corddry, Ellen Barkin, Odette Yustman, Zach Galifianakis,Emilie de Ravin, Maggie Q, Adam Scott, Brandon T Jackson, Beth Grant, Bob Odenkirk, Michael Hitchcock, Ving Rhames, Jeffrey Tambor, Tim Bagley