Don Chumera De Laredo, an eccentric old friend of Lucas's, arrives at the McCain ranch announcing flamboyantly that he has come to accomplish a deed of honor. Don Laredo lies to play the part of a Knight in armor, even to the point of insisting on a jousting match with his sworn enemy Colonel Black. When Lucas learns that the whole fuss started over a chess game in which each man accused the other of cheating, he persuades them to settle the grudge with another game of chess, but a twist of circumstances brings two new villains into the picture.