Trauma Chief Jorge Villanueva treats what appears to be an attempted suicide by car only to discover that the crash victim suffered a life-threatening brain aneurysm. Renowned neurosurgeon Dr. Ty Wilson is shaken by the case of 11-year-old Quinn McDaniels, whose soccer injury reveals a much graver problem. Workaholic Dr. Sydney Napur solves a case that had the rest of the hospital staff stumped. Meanwhile, Dr. Sung Park performs high-tech deep brain stimulation on a patient with uncontrollable hand tremors.