As racial tensions simmer inside the prison and Veronica digs into Lincoln's case, Michael tries to get a drug that will help him test positive for diabetes, and to secure a large bolt he can use in his escape plan.
Tensions mount after Lincoln warns Michael that someone in the group will have to remain behind, Michael makes progress in reaching the infirmary, and Abruzzi threatens to kill T-Bag if he doesn't drop out of the group.
In an effort to recreate the missing piece of the tattoo, Michael gets transferred to the psych ward, seeking the help of Haywire. Meanwhile, T-Bag and C-Note have to join forces.
Westmoreland takes drastic action to prevent Bellick from unravelling their plans forcing the inmates to speed up their escape, Michael begs Sara to help him, and Veronica is betrayed by Nick.
Sara considers whether she should help Michael with his plan, Michael betrays Warden Pope, and Veronica finds evidence that points her to Montana, but realises that her closest ally may actually be her greatest enemy.