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After his release from prison, bank robber Zequi sets off to recover the stolen money that was buried by his dizzy accomplice. He's horrified to learn that a high school gymnasium is now standing over the site where the loot is stashed. Needing to infiltrate the building, Zequi lands a job as a substitute teacher for a group of wild and unruly students. As the ex-con tries to lay down the law, he starts to realize that life in jail may have been easier than trying to deal with rebellious teens. Wikipedia