Crime · " 21 " is the fact-based story about six MIT students who were trained to become experts in . Q: Who are the real people behind the characters in the book and movie? Q: Did they really go to Vegas on weekends to play blackjack?. Beim Blackjack besteht das Ziel des Spiels darin, so nah wie möglich an einen Kartenwert von 21 zu kommen, und zwar ohne diesen Wert zu überschreiten. While the popularity of Blackjack dates from World War I, its roots go back to the s in France, where it is called Vingt-et-Un (French for 21). Today, Blackjack.