Teddy is called away on another case, as Henry is brought in for emergency surgery; Derek and Meredith finally receive news about Zola; a patient experiences complications after surgery.
The eldest daughter of a family involved in a car crash must make a difficult decision; Teddy asks Cristina to help with an O.R. patient; Lexie works with Mark's new girlfriend during a surgery.
The CSIs are called to investigate a car crash and are shocked to discover the victim is someone they know.
The CSIs track a cannibalistic killer and discover he's not alone.