Part 1:
Police Officer Frank Leo works Bridge Division -- a precinct that encompasses the richest and poorest neighborhoods in the city. He's a dedicated street cop, who inadvertently gets involved in police politics when his training officer dies and there won't be a police funeral. Frank rallies his fellow officers and upsets the "brass" when he stages an unofficial police funeral. They bug his house. His political agenda gets furthered when fellow officers are being railroaded by the police board with charges of excessive force and he decides to stage a walkout.
Unbeknownst to Frank, a colleague of his, Mike, is involved in a series of drug dealer rip-offs. So far, the police department is aware that uniforms are missing, but has no idea what they're being used for.
Part 2:
Frank negotiates a settlement to the walkout with Police Chief Wycoff, but he's made himself a target for other members of the "Brass", who want him gone. When a suspect dies in a gun fight after a police chase, they believe they've got leverage to bring Frank down. They send in a fellow officer, wired to ask him questions. They also accuse him of the drug rip-offs. Galvanized by this pressure, Frank becomes the head of the police union and fights to bring more protection to the cops on the street. Unfortunately Chief Wycoff brings him his first major decision: they've identified Mike as the cop leading the drug dealer rip-offs and have tape of him saying to kill other cops if they get in the way. Frank must give permission for them to use lethal force to bring Mike in. Frank has no choice but to give the order, however, works to find a better solution.
As he heads home, Frank's fellow cop, Ross, shows up - he's accidentally killed his wife and needs Frank's help.