The Presidio

At the Presidio Army base in San Francisco, MP Patti Jean Lynch is shot dead while investigating a break-in and two San Francisco police officers are killed in the getaway. Jay Austin, a San Francisco police detective, is sent to investigate. He clashes with Lieutenant Colonel Alan Caldwell, the base provost marshal.

Years earlier, Austin and Lynch were partners while serving as MPs and Caldwell was their commanding officer. When Austin arrested Lieutenant Colonel Paul Lawrence, Caldwell did not support him. In the aftermath, Austin was demoted and decided to leave the Army.