Le signe de justice

Jack Cole is sent to prison for a crime he didn't commit. Because of his status as a "rich kid" he faces retribution. After a personal loss he his accepted by the general population. He decides to take advantage of the situation and learn "the tricks of the trade". Learning lock picking, how to beat security systems, and other outside the law activities. The commonsense thing is: "If the guys were so good why did they get caught?" Hey, its fantasy.

The M.O. is when acquiring a target the perpetrator is sent a series of cards with the number "three" as a warning with a "catch phrase" finally ending with the three of spades. The number three is for the number of years served in prison by the way.