Watch Fmovies. Led by a detective hell-bent on revenge, a team of undercover cops in Los Angeles attempt to bring down a powerful drug mob from the inside. Operating outside the law, they put everything on the line to clean up the streets and exact payback on the king pin who devastated their families. Based on the true story of Mexico's most powerful drug lord, Cartel War is an action-packed journey into an all-too-real violent underworld.