A border-town became the subject of heated political turmoil between the US & Mexico when a Mexican bandit starts killing as many US soldiers as he can once a cavalry officer - who maintains the law until it could be decided who the town belongs to - gets murdered by the bandits. A gambler who happens to be the brother of the officer dresses in his brother's uniform, taking on the bandits - which makes them think he's still alive.
Gentleman Killer, in a nutshell, is a top notch Spaghetti western, thoroughly engaging and tense from start to finish. The action is very exciting, matching the hard driving plot. Sure it has familiar genre tropes like the bandits laughing after they've killed someone, hero playing a group of the gang against each other, the bandits lay out an elaborate death for the hero that somehow never happens instead of just killing him, etc., but there is a certain energy in the plot, the pace is very good, plus it's mainly set the town with a nifty cat and mouse game at play. Here, Anthony Steffen isn't stubbled or dressed in grubby clothes or looks maudlin- he's a fancy dressed gambler who shows a bit of charm. Like Sabata but not as ghostlike. He really gives the horrid bandit leader played by Spanish actor Eduardo Fajardo and his muchachos a hard time. The premise of a border town dispute is quite offbeat - makes a change from hunting for hidden gold. This time it's a fight over who owns the town.