Lucky Luke learns that five (!) Dalton have just escaped. Indeed, a skilful prestidigitator named Fingers has participated in the escape of the Daltons but it is also he who will allow them to be sent back to prison. Claiming unjustly condemned, this "gentleman burglar" needs the support of Lucky Luke for his recourse to grace. He will win but Lucky Luke will keep an eye on him because his hands escape from control!