Plot

An ex-soldier inherits a prison and goes undercover as an inmate to expose corruption. When his trusted head guard is revealed as the criminal mastermind, he must prove his true identity or escape while protecting vulnerable inmates.

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?