While Dan and Zoe follow Butch Bender to expose him as medical insurance scam artist, someone runs off with a patients life-saving transplant kidney. They promise to get off his back if he indicates the kidney thief, but it's Oscar Winter, who has a leg prosthesis since Vietnam. Searching for Zoes niece Hannah's stolen volcano project, they find Bender's corps in a car booth. Dan then decides to investigate the where-beings of the kidney, plausibly illegally sold, and the nurse Yasmin points to shady employee Jimmy Sharp, who is found overdosed in the morgue. Tracing a vital drug, they find young Wally Cates got a new kidney, which his dad George assures to have donated, but is blood-type-incompatible...