10th and Wolf was inspired by a true story from the real life FBI agent known as "Donnie Brasco". Marine Sgt. Tommy Santoro (James Marsden) thought he had left his family's ties to the mafia behind. But a visit from the F.B.I. sends him home to the tightly-knit South Philly neighborhood of 10th and Wolf to face the biggest moral dilemma of his life.