In the rail yards of Queens, contractors repair and rebuild the city's subway cars. These contracts are lucrative, so graft and corruption are rife. When Leo Handler gets out of prison, he finds his aunt married to Frank Olchin, one of the big contractors; he's battling with a minority-owned firm for contracts.

In cases ripped from the headlines, police investigate serious and often deadly crimes, weighing the evidence and questioning the suspects until someone is taken into custody. The district attorney's office then builds a case to convict the perpetrator by proving the person guilty beyond a reasonable doubt. Working together, these expert teams navigate all sides of the complex criminal justice system to make New York a safer place.