Lobby Hero by Kenneth Lonergan

Lobby Hero tells the story of Jeff, a luckless young security guard trying to get his life together after being thrown out of the navy. But the lobby proves to be no sanctuary from the world, as Jeff is drawn into a local murder investigation involving his supervisor. Also mixed in with the investigation is a tightly wound young man called upon to bear witness against his troubled brother, and a rookie policewoman who is in over her head with her seasoned but unscrupulous hero-cop partner.

Lobby Hero is a moving, emotionally-nuanced drama mixing ideas about race, gender, class, and corruption with moments of wit, comedy, and romance.