The brother of death-row inmate Lincoln Burrows intentionally gets himself incarcerated, then plans to use his skills as a structural engineer to free him.
Flashbacks unveil how Lincoln, Sucre, T-Bag, C-Note and Dr. Sara ended up in prison and what drove Michael to plan his brother's escape.
Michael is unsure how to continue when he learns that an old storage shed crucial to the escape plan has been turned into the guard's break room.
Michael sacrifices Fibonnaci to Philly in order to restore Abruzzi as commander of the prison's work detail and put the escape plan back on track.
As the riot escalates, Michael faces a difficult decision regarding the life of Dr. Sara; Abruzzi and Sucre team up to break the devil's back.