Greene struggles to cope with an understaffed emergency department during a night shift. A teenager overdoses on a toxic chemical, and a baby is injured in a drive-by shooting.
A psychiatric inmate is found with a murder weapon in hand at the scene of a brutal murder. The inmate also confesses but Dr Blake doubts the case is quite as neat as it appears.
When a man resembling Elvis saves Reno in a bar fight, Reno's curiosity compels him to track down the mysterious man.