When a group of corrupt cops known as the Ravens are arrested, they must induct an FBI mole into their ranks or face prison.

With Tom's life threatened in prison, Hammond and Cole demand that kingpin Neckbone call off his dogs.

A text message from beyond the grave puts the Ravens on edge, and Neckbone pressures the Ravens.

After a shocking massacre of innocents, agent Price pressures the Ravens to track the source of WMD, a dangerous new street drug.

Beach hangs Foster out to dry, putting the Ravens and the Vipers in a position of mutual self-destruction.

Tom's revenge against Winters risks an all-out gang war, and Neckbone gives Hammond a deadly ultimatum.