When Ivan Sarnoff gets sick at the prison, he is transported to a hospital in an ambulance. But the ambulance is attacked and crashes into a train, resulting in Ivan escaping. While the rest of the team investigates where Ivan is, Calleigh tries to prevent Eric from helping his dangerous father, but Eric does it anyway, putting his own life in jeopardy. Meanwhile, Yelina is kidnapped by Ivan and Horatio tries to save her.