Mr. Flint (2018)

Adam, a military veteran and skillful spy, infiltrates the house of Mr. Charles, a war profiteer as the lover of the sister to steal the codes of a lethal weapon that Mr. Charles is creating. When he steals the code, he is surrounded by bodyguards and he finds out that the sister, Ms. Charles, was waiting for him to do the dirty work and then steal it from him. By this, Adam uses his skills and escapes from them and realizes that he should never lower his guard and not trust anyone.