黑牢之下

In Undercover Prison King movie, when ex-soldier Troy Poe inherits a corrupt private prison, he decides to go in undercover as an inmate to expose those responsible. But when the head guard, a man who he trusted, turns out to be the leader of the crime ring , Troy must find a way to convince the officials that he is not a prisoner, but in fact, the owner of the prison... or break out. All the while, he must protect those in danger, including a weak old prisoner whose sentence has been falsely extended, and a beautiful doctor who's caught in the crossfire. Will Troy find a way to escape? Or will he become just another casualty of his own prison?