When Los Angeles' newly elected sheriff dies, Bill Hollister is suddenly propelled into the role as head of one of the largest police forces in the world.

As he struggles to come to terms with the new responsibilities of his role as sheriff, Bill refuses to stay out of the field when a criminal to whom he is personally connected resurfaces; two new deputies come into the picture.

After a mysterious shooting leaves one of their own injured, Bill and the team go on a mission to find the shooter; when Undersheriff London tries to take control of the department, Bill reminds him who is in charge.

While enforcing an unsanctioned raid on a human trafficking ring in Los Angeles, Bill finds an old informant of his who is in trouble; Charlie is assigned to patrol with Joseph, the one person she would like to avoid; Jerry does Bill a favour.

When Joseph's childhood friend is wrongfully accused by the LAPD, he involves Bill in his mission to find the truth; Paula is placed in a tough position when her hospital puts her in charge of making staff cuts in order to meet its budget.

When a gunman walks into the medical wing of the Los Angeles Correctional Facility where Paula is volunteering, Bill looks for a way to get her out; with only three months left for Bill as sheriff, others decide to make a run for the role.