The cowboy who draws a gun faster than his shadow is back! Lucky Luke, the famous wandering cowboy fights crime and injustice, most often in the form of the bumbling Dalton brothers. He rides Jolly Jumper, "the smartest horse in the world" and is often accompanied by Rantanplan, "the stupidest dog in the universe".
A judge requires Lucky to escort New York zoology professor, Oscar Tinyboots, a snail expert, to St. Bob, Kansas. He's the star witness against Smiley Laughter, having killed a protected animal. Smiley, a gangster, has never lost a trial because he has all the witnesses murdered.