When a young boy's legs are crushed after being pinned by a car, Malik is determined to use a revolutionary procedure using spider silk to save his limbs, while Zoe lobbies in favor of the safer route of amputation. Also, James, Walter and Talaikha care for Amelia, a young woman in dire need of a liver transplant, but they're puzzled by her resistance when they tell her the donor is her estranged father, Simon.