Grosse Pointe Blank (1997)

Martin Blank is a freelance hitman who starts to develop a conscience, which causes him to muff a couple of routine assignments. On the advice of his secretary and his psychiatrist, he attends his 10-year high-school reunion in Grosse Pointe, Michigan, a Detroit suburb where he's also contracted to kill someone. Hot on his tail are a couple of over-enthusiastic federal agents, another assassin who wants to kill him, and Grocer, an assassin who wants him to join an "Assassins' Union."