Alex Cahill is threatened by former Sheriff Baker who has served his sentence and is now out for revenge.

While protecting a congressman from an assassin, Walker bumps into an old friend.

Among the issues Walker has to deal with include a new partner named Trivette, a group of men terrorizing a circus family who camp out at his home, and some bad guys who plan on the ultimate bank caper.

Walker's investigation of a cashpoint robbery becomes a race to catch two young criminals before they are found by a vicious bounty hunter.

Trivette goes undercover as a prison inmate but becomes caught up in a deadly escape mission.

An old friend turns to Walker for help when his pregnant daughter falls under the spell of a religious cult.