Walker and Trivette attempt to protect Alex from a released convict, a former sheriff who swore revenge when she sent him to prison.

Amidst a bank robbery in Dallas, Walker's partner is killed. While trying to solve this case, Walker finds out that the hold-up could have been only a test for a much bigger booty: simultaneously robbing four banks lying next to each other. No one believes him. After a bomb explodes in a distant bank, which has just gotten a valuable load, every officer runs to there. When the actual raid starts Walker must face the gang alone.