L.627 is a 1992 French film directed by Bertrand Tavernier.

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Lucien Marguet, nicknamed "Lulu" is an investigator of the second class in the judicial police in the Paris head office. He is a field officer, so passionate about his work that he sometimes sacrifices his family responsibilities with his wife, a doctor, and his ailing mother. After his superior cancels a drug stakeout so he can use the stakeout van to drive home, even though he has been drinking, Lulu shows his contempt for him in front of their colleagues and is thrown out of the brigade.

After a period dealing with minor public complaints in one suburban police precinct, he joins a suburban police team fighting drug trafficking. The film covers their operations, their relationships with colleagues and informants, and the challenge of working with insufficient equipment and supplies. Lulu is obsessed with getting results: others on the team are more interested in slacking off and enjoying themselves. He has few close acquaintances apart from a prostitute who is HIV positive and a drug addict whose prospects are limited.