when a young woman confess to a murder she didn’t commit, a police detective must, on a deadline, do everything she can to solve the mystery or else let a murderer go free, and send an innocent to prison.

In what country is the story set? The logline is not credible, doesn't make any sense for how criminal procedure works in the United States.

Hola! Cuál sería el misterio que debe resolver el detective? La joven no se declaró culpable? o hay algo que hace pensar al detective que ella miente?